fix: add GH_TOKEN to build steps for electron-builder

- Import from folder or removable drive via File menu
- MD5 checksum-based duplicate detection from audio content
- Windows drive detection with removable/fixed type labels
- Drive accessibility verification before listing
- Import files copied to _Imports/<date>/ folders
- Comprehensive logging for import debugging

.github/workflows/build-all.yml

@@ -0,0 +1,89 @@
+name: Build All Platforms
+
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+
+jobs:
+  build-windows:
+    runs-on: self-hosted
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Build Windows
+        run: npm run dist:win
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Upload Windows artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: windows-installer
+          path: release/*.exe
+
+  build-linux:
+    runs-on: self-hosted
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Build Linux
+        run: npm run dist:linux
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Upload Linux artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: linux-packages
+          path: |
+            release/*.AppImage
+            release/*.deb
+            release/*.rpm
+
+  release:
+    needs: [build-windows, build-linux]
+    runs-on: ubuntu-latest
+    if: startsWith(github.ref, 'refs/tags/')
+    steps:
+      - name: Download Windows artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: windows-installer
+
+      - name: Download Linux artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: linux-packages
+
+      - name: Create Release
+        uses: softprops/action-gh-release@v1
+        with:
+          files: |
+            *.exe
+            *.AppImage
+            *.deb
+            *.rpm
+          draft: false
+          prerelease: false
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/build.yml

@@ -1,29 +0,0 @@
-name: Build/release
-
-on:
-  push:
-    tags:
-      - 'v*'
-
-jobs:
-  release:
-    runs-on: windows-latest
-
-    steps:
-      - name: Check out Git repository
-        uses: actions/checkout@v4
-
-      - name: Install Node.js and NPM
-        uses: actions/setup-node@v4
-        with:
-          node-version: 20
-
-      - name: Install dependencies
-        run: npm install
-
-      - name: Build/release Electron app
-        uses: samuelmeuli/action-electron-builder@v1
-        with:
-          github_token: ${{ secrets.github_token }}
-          release: ${{ startsWith(github.ref, 'refs/tags/v') }}
-          args: --win

README.md

@@ -16,6 +16,7 @@ A desktop application for organizing, tagging, and managing WAV audio files with
 ### Powerful Search & Organization
 - Fuzzy search across filenames, tags, categories, and metadata
 - Filter by category or view untagged files
+- Quick "JUST SPLIT" filter surfaces freshly generated segments for rapid QC
 - Multi-select support for batch operations
 - Custom naming with automatic conflict resolution
 
@@ -45,19 +46,6 @@ A desktop application for organizing, tagging, and managing WAV audio files with
 
 ![Smooth UI Demo](repoimages/smoothui.gif)
 
-### Smart Library Management
-- Automatic library scanning and indexing
-- MD5 checksums for duplicate detection
-- Metadata caching for instant access
-- SQLite database for fast queries and reliable storage
-
-## Technology Stack
-
-- **Frontend**: React 18, TypeScript, Vite
-- **Backend**: Electron 29, Node.js
-- **Database**: better-sqlite3 with WAL mode
-- **Audio Processing**: WaveFile, music-metadata
-- **Search**: Fuse.js for fuzzy search
 
 ## Installation
 

package.json

@@ -1,7 +1,12 @@
 {
   "name": "audio-sort",
-  "version": "0.3.0",
+  "version": "0.5.2",
   "description": "Electron audio sorting application with fuzzy search, tagging, library management, and advanced waveform editing with audio splitting capabilities for WAV files.",
+  "author": {
+    "name": "litruv",
+    "email": "litruv@example.com",
+    "url": "https://lit.ruv.wtf"
+  },
   "main": "dist/main/main/index.js",
   "type": "commonjs",
   "scripts": {
@@ -16,33 +21,36 @@
     "start": "cross-env NODE_ENV=production electron ./dist/main/main/index.js",
     "pack": "npm run build && electron-builder --dir",
     "dist": "npm run build && electron-builder",
-    "dist:win": "npm run build && electron-builder --win"
+    "dist:win": "npm run build && electron-builder --win",
+    "dist:linux": "npm run build && electron-builder --linux",
+    "postinstall": "patch-package"
   },
   "dependencies": {
-    "better-sqlite3": "^11.0.0",
+    "better-sqlite3": "^12.4.1",
-    "csv-parse": "^5.5.5",
+    "csv-parse": "^6.1.0",
-    "fast-glob": "^3.3.2",
+    "fast-glob": "^3.3.3",
-    "fuse.js": "^6.6.2",
+    "fuse.js": "^7.1.0",
-  "music-metadata": "^10.5.0",
+    "music-metadata": "^11.10.0",
-  "standardized-audio-context": "^25.3.12",
+    "react": "^19.2.0",
-    "react": "^18.3.1",
+    "react-dom": "^19.2.0",
-    "react-dom": "^18.3.1",
+    "standardized-audio-context": "^25.3.77",
     "wavefile": "^11.0.0"
   },
   "devDependencies": {
-    "@types/better-sqlite3": "^7.6.8",
+    "@types/better-sqlite3": "^7.6.13",
-    "@types/node": "^20.12.7",
+    "@types/node": "^24.10.0",
-    "@types/react": "^18.3.3",
+    "@types/react": "^19.2.2",
-    "@types/react-dom": "^18.3.0",
+    "@types/react-dom": "^19.2.2",
-    "@vitejs/plugin-react": "^4.3.3",
+    "@vitejs/plugin-react": "^5.1.0",
-    "concurrently": "^8.2.2",
+    "concurrently": "^9.2.1",
-    "cross-env": "^7.0.3",
+    "cross-env": "^10.1.0",
-    "electron": "^32.0.0",
+    "electron": "^39.1.2",
     "electron-builder": "^26.0.12",
+    "patch-package": "^8.0.1",
     "tree-kill": "^1.2.2",
-    "tsx": "^4.15.7",
+    "tsx": "^4.20.6",
-    "typescript": "^5.3.3",
+    "typescript": "^5.9.3",
-    "vite": "^5.1.6"
+    "vite": "^7.2.2"
   },
   "build": {
     "appId": "com.audiosort.app",
@@ -55,13 +63,29 @@
       "output": "release"
     },
     "win": {
-      "target": ["nsis"],
+      "target": [
+        "nsis"
+      ],
       "icon": "build/icon.ico"
     },
     "nsis": {
       "oneClick": false,
       "allowToChangeInstallationDirectory": true
     },
+    "linux": {
+      "target": [
+        "AppImage",
+        "deb",
+        "rpm"
+      ],
+      "icon": "build/icon.png",
+      "category": "AudioVideo",
+      "description": "Audio sorting and management application",
+      "mimeTypes": [
+        "audio/wav",
+        "audio/x-wav"
+      ]
+    },
     "extraResources": [
       {
         "from": "data/UCS.csv",

patches/better-sqlite3+12.4.1.patch

@@ -0,0 +1,13 @@
+diff --git a/node_modules/better-sqlite3/src/better_sqlite3.cpp b/node_modules/better-sqlite3/src/better_sqlite3.cpp
+index 024bb4f..28a4d55 100644
+--- a/node_modules/better-sqlite3/src/better_sqlite3.cpp
++++ b/node_modules/better-sqlite3/src/better_sqlite3.cpp
+@@ -46,7 +46,7 @@ class Backup;
+ #include "objects/statement-iterator.cpp"
+ 
+ NODE_MODULE_INIT(/* exports, context */) {
+-	v8::Isolate* isolate = context->GetIsolate();
++	v8::Isolate* isolate = v8::Isolate::GetCurrent();
+ 	v8::HandleScope scope(isolate);
+ 	Addon::ConfigureURI();
+ 

src/main/MainApp.ts

@@ -47,16 +47,22 @@ export class MainApp {
 
     this.searchService.rebuildIndex();
     this.registerIpcHandlers();
-    this.createMenu();
+    await this.createMenu();
     this.createWindow();
   }
 
   /**
    * Creates the application menu.
    */
-  private createMenu(): void {
+  private async createMenu(): Promise<void> {
     const isMac = process.platform === 'darwin';
+    const drives = await this.listAvailableDrives();
     
+    const driveSubmenu: Electron.MenuItemConstructorOptions[] = drives.map((drive) => ({
+      label: drive.label,
+      click: () => this.mainWindow?.webContents.send('import-from-drive', drive.path)
+    }));
+
     const template: Electron.MenuItemConstructorOptions[] = [
       ...(isMac ? [{
         label: app.name,
@@ -79,6 +85,16 @@ export class MainApp {
       {
         label: 'File',
         submenu: [
+          {
+            label: 'Import From Folder...',
+            accelerator: isMac ? 'Cmd+Shift+I' : 'Ctrl+Shift+I',
+            click: () => this.mainWindow?.webContents.send('import-from-folder')
+          },
+          {
+            label: 'Import From Drive',
+            submenu: driveSubmenu.length > 0 ? driveSubmenu : [{ label: 'No drives available', enabled: false }]
+          },
+          { type: 'separator' as const },
           {
             label: 'Rescan Library',
             accelerator: isMac ? 'Cmd+R' : 'Ctrl+R',
@@ -132,6 +148,8 @@ export class MainApp {
     ipcMain.removeHandler(IPC_CHANNELS.settingsGet);
     ipcMain.removeHandler(IPC_CHANNELS.settingsSetLibrary);
     ipcMain.removeHandler(IPC_CHANNELS.dialogSelectLibrary);
+    ipcMain.removeHandler(IPC_CHANNELS.dialogSelectImportFolder);
+    ipcMain.removeHandler(IPC_CHANNELS.systemListDrives);
     ipcMain.removeHandler(IPC_CHANNELS.libraryScan);
     ipcMain.removeHandler(IPC_CHANNELS.libraryList);
     ipcMain.removeHandler(IPC_CHANNELS.libraryRename);
@@ -143,6 +161,7 @@ export class MainApp {
   ipcMain.removeHandler(IPC_CHANNELS.libraryUpdateMetadata);
    ipcMain.removeHandler(IPC_CHANNELS.librarySplit);
     ipcMain.removeHandler(IPC_CHANNELS.libraryWaveformPreview);
+    ipcMain.removeHandler(IPC_CHANNELS.libraryImport);
     ipcMain.removeHandler(IPC_CHANNELS.tagsUpdate);
     ipcMain.removeHandler(IPC_CHANNELS.categoriesList);
     ipcMain.removeHandler(IPC_CHANNELS.searchQuery);
@@ -215,7 +234,7 @@ export class MainApp {
     });
 
     ipcMain.handle(IPC_CHANNELS.dialogSelectLibrary, async () => {
-  const options: Electron.OpenDialogOptions = { properties: ['openDirectory'] };
+      const options: Electron.OpenDialogOptions = { properties: ['openDirectory'] };
       const targetWindow = this.mainWindow;
       const result = targetWindow
         ? await dialog.showOpenDialog(targetWindow, options)
@@ -223,6 +242,17 @@ export class MainApp {
       return result.canceled ? null : result.filePaths[0] ?? null;
     });
 
+    ipcMain.handle(IPC_CHANNELS.dialogSelectImportFolder, async () => {
+      const options: Electron.OpenDialogOptions = { properties: ['openDirectory'] };
+      const targetWindow = this.mainWindow;
+      const result = targetWindow
+        ? await dialog.showOpenDialog(targetWindow, options)
+        : await dialog.showOpenDialog(options);
+      return result.canceled ? null : result.filePaths[0] ?? null;
+    });
+
+    ipcMain.handle(IPC_CHANNELS.systemListDrives, async () => this.listAvailableDrives());
+
     ipcMain.handle(IPC_CHANNELS.libraryScan, async () => this.requireLibrary().scanLibrary());
     ipcMain.handle(IPC_CHANNELS.libraryList, async () => this.requireLibrary().listFiles());
     ipcMain.handle(IPC_CHANNELS.libraryGetById, async (_event: IpcMainInvokeEvent, fileId: number) =>
@@ -306,6 +336,19 @@ export class MainApp {
       ) =>
         this.requireLibrary().updateFileMetadata(fileId, metadata)
     );
+
+    ipcMain.handle(IPC_CHANNELS.libraryImport, async (_event: IpcMainInvokeEvent, payload: unknown) => {
+      if (!Array.isArray(payload)) {
+        throw new Error('Import request must provide an array of source paths.');
+      }
+      const sources = payload
+        .map((entry) => (typeof entry === 'string' ? entry.trim() : ''))
+        .filter((entry) => entry.length > 0);
+      if (sources.length === 0) {
+        return { imported: [], skipped: [], failed: [] };
+      }
+      return this.requireLibrary().importExternalSources(sources);
+    });
   }
 
   /**
@@ -360,6 +403,86 @@ export class MainApp {
     return app.getAppPath();
   }
 
+  private async listAvailableDrives(): Promise<Array<{ path: string; label: string }>> {
+    if (process.platform === 'win32') {
+      try {
+        const { exec } = await import('node:child_process');
+        const { promisify } = await import('node:util');
+        const execAsync = promisify(exec);
+        
+        // Query Windows Management Instrumentation for drive info
+        const { stdout } = await execAsync('wmic logicaldisk get deviceid,drivetype', { 
+          timeout: 5000,
+          windowsHide: true 
+        });
+        
+        const lines = stdout.trim().split('\n').slice(1); // Skip header
+        const drives: Array<{ path: string; type: string }> = [];
+        
+        for (const line of lines) {
+          const trimmed = line.trim();
+          if (!trimmed) continue;
+          
+          // Parse "C:            3" format (DeviceID and DriveType)
+          const match = trimmed.match(/^([A-Z]:)\s+(\d+)$/);
+          if (!match) continue;
+          
+          const [, deviceId, driveType] = match;
+          const drivePath = `${deviceId}\\`;
+          
+          // Verify drive is actually accessible before including it
+          try {
+            await fs.promises.access(drivePath);
+          } catch {
+            continue; // Skip if not accessible (unplugged/ejected)
+          }
+          
+          // DriveType: 2=Removable, 3=Local Fixed, 4=Network, 5=CD-ROM, 6=RAM Disk
+          let label = drivePath;
+          if (driveType === '2') {
+            label = `${drivePath} (Removable)`;
+          }
+          
+          drives.push({ path: drivePath, type: label });
+        }
+        
+        return drives.sort((a, b) => a.path.localeCompare(b.path)).map((d) => ({ path: d.path, label: d.type }));
+      } catch (error) {
+        console.warn('Failed to query drive types via wmic, falling back to simple enumeration', error);
+        // Fallback to basic enumeration
+        const drives: { path: string; label: string }[] = [];
+        const probes: Promise<void>[] = [];
+        for (let code = 65; code <= 90; code += 1) {
+          const letter = String.fromCharCode(code);
+          const drivePath = `${letter}:\\`;
+          const probe = fs.promises
+            .access(drivePath)
+            .then(() => {
+              drives.push({ path: drivePath, label: drivePath });
+            })
+            .catch(() => undefined);
+          probes.push(probe);
+        }
+        await Promise.all(probes);
+        return drives.sort((a, b) => a.path.localeCompare(b.path));
+      }
+    }
+
+    if (process.platform === 'darwin') {
+      try {
+        const entries = await fs.promises.readdir('/Volumes', { withFileTypes: true });
+        const volumes = entries
+          .filter((entry) => entry.isDirectory())
+          .map((entry) => ({ path: path.join('/Volumes', entry.name), label: path.join('/Volumes', entry.name) }));
+        return volumes.length > 0 ? volumes : [{ path: '/', label: '/' }];
+      } catch {
+        return [{ path: '/', label: '/' }];
+      }
+    }
+
+    return [{ path: '/', label: '/' }];
+  }
+
   private buildSearchBases(): string[] {
     const bases = new Set<string>();
     const appPath = app.getAppPath();

src/main/services/LibraryService.ts

@@ -4,7 +4,18 @@ import { createHash } from 'node:crypto';
 import path from 'node:path';
 import fg from 'fast-glob';
 import { parse } from 'csv-parse/sync';
-import { AppSettings, AudioBufferPayload, AudioFileSummary, CategoryRecord, LibraryScanSummary, SplitSegmentRequest, TagUpdatePayload } from '../../shared/models';
+import {
+  AppSettings,
+  AudioBufferPayload,
+  AudioFileSummary,
+  CategoryRecord,
+  ImportFailureEntry,
+  ImportSkipEntry,
+  LibraryImportResult,
+  LibraryScanSummary,
+  SplitSegmentRequest,
+  TagUpdatePayload
+} from '../../shared/models';
 import { DatabaseService, FileRecordInput } from './DatabaseService';
 import { SettingsService } from './SettingsService';
 import { TagService } from './TagService';
@@ -12,6 +23,15 @@ import { SearchService } from './SearchService';
 import { WaveFile } from 'wavefile';
 import { OrganizationService } from './OrganizationService';
 
+type MusicMetadataParser = (path: string, options?: { duration?: boolean }) => Promise<{
+  format: { duration?: number | null; sampleRate?: number | null; bitsPerSample?: number | null };
+  common: { comment?: unknown[]; genre?: unknown[]; subtitle?: unknown };
+}>;
+
+type MusicMetadataNamespace = Partial<{ parseFile: MusicMetadataParser }> & {
+  default?: Partial<{ parseFile: MusicMetadataParser }>;
+};
+
 interface CsvCategoryRow {
   Category: string;
   SubCategory: string;
@@ -32,6 +52,7 @@ export class LibraryService {
   private metadataSuggestionCache: { authors: Set<string> } | null = null;
   private readonly waveformPreviewCache = new Map<number, { modifiedAt: number; pointCount: number; samples: number[]; rms: number }>();
   private offlineAudioContextCtor: (new (channelCount: number, length: number, sampleRate: number) => any) | null = null;
+  private musicMetadataParseFile: MusicMetadataParser | null = null;
   public constructor(
     private readonly database: DatabaseService,
     private readonly settings: SettingsService,
@@ -282,6 +303,138 @@ export class LibraryService {
     return cleanedCount;
   }
 
+  /**
+   * Imports external WAV files from the provided sources, copying them into the library while
+   * skipping duplicates based on the audio checksum. Imported files land under `_Imports/<date>`.
+   */
+  public async importExternalSources(sourcePaths: string[]): Promise<LibraryImportResult> {
+    // eslint-disable-next-line no-console -- Log import start for debugging.
+    console.log('Starting import from:', sourcePaths);
+    
+    if (!Array.isArray(sourcePaths) || sourcePaths.length === 0) {
+      return { imported: [], skipped: [], failed: [] };
+    }
+
+    const libraryRoot = this.settings.ensureLibraryPath();
+    const normalisedLibraryRoot = this.normalizeAbsolutePath(libraryRoot);
+    const libraryRootWithSlash = normalisedLibraryRoot.endsWith('/')
+      ? normalisedLibraryRoot
+      : `${normalisedLibraryRoot}/`;
+
+    const existingFiles = this.database.listFiles();
+    const knownChecksums = new Set<string>();
+    const knownPaths = new Set<string>();
+    for (const file of existingFiles) {
+      if (typeof file.checksum === 'string' && file.checksum.length > 0) {
+        knownChecksums.add(file.checksum);
+      }
+      knownPaths.add(this.normalizeAbsolutePath(file.absolutePath));
+    }
+
+    const importFolderRelativeBase = path.join('_Imports', new Date().toISOString().slice(0, 10));
+    const importFolderAbsolute = path.join(libraryRoot, importFolderRelativeBase);
+    await fs.mkdir(importFolderAbsolute, { recursive: true });
+
+    const { files: candidateFiles, failures } = await this.collectImportCandidates(sourcePaths);
+    
+    // eslint-disable-next-line no-console -- Log discovered files for debugging.
+    console.log(`Found ${candidateFiles.length} candidate files, ${failures.length} collection failures`);
+    if (failures.length > 0) {
+      // eslint-disable-next-line no-console -- Log collection failures for debugging.
+      console.log('Collection failures:', failures);
+    }
+
+    const imported: AudioFileSummary[] = [];
+    const skipped: ImportSkipEntry[] = [];
+    const failed: ImportFailureEntry[] = [...failures];
+    const usedNames = new Set<string>();
+    const allowedExtensions = new Set(['.wav', '.wave']);
+
+    const folderRelativeNormalised = this.normalizeRelativePath(
+      path.relative(libraryRoot, importFolderAbsolute)
+    );
+    const folderForJoin =
+      folderRelativeNormalised === '.' || folderRelativeNormalised.length === 0
+        ? ''
+        : folderRelativeNormalised;
+
+    for (const candidate of candidateFiles) {
+      const extension = path.extname(candidate).toLowerCase();
+      if (!allowedExtensions.has(extension)) {
+        // eslint-disable-next-line no-console -- Log skip reason for debugging.
+        console.log(`Skipping ${candidate}: unsupported extension ${extension}`);
+        skipped.push({ path: candidate, reason: 'unsupported' });
+        continue;
+      }
+
+      const normalisedCandidate = this.normalizeAbsolutePath(candidate);
+      if (
+        normalisedCandidate === normalisedLibraryRoot ||
+        normalisedCandidate.startsWith(libraryRootWithSlash)
+      ) {
+        // eslint-disable-next-line no-console -- Log skip reason for debugging.
+        console.log(`Skipping ${candidate}: already inside library`);
+        skipped.push({ path: candidate, reason: 'inside-library' });
+        continue;
+      }
+
+      if (knownPaths.has(normalisedCandidate)) {
+        // eslint-disable-next-line no-console -- Log skip reason for debugging.
+        console.log(`Skipping ${candidate}: duplicate path`);
+        skipped.push({ path: candidate, reason: 'duplicate' });
+        continue;
+      }
+
+      // eslint-disable-next-line no-console -- Log checksum computation for debugging.
+      console.log(`Computing checksum for ${candidate}...`);
+      const checksum = await this.computeFileChecksum(candidate);
+      if (!checksum) {
+        // eslint-disable-next-line no-console -- Log skip reason for debugging.
+        console.log(`Skipping ${candidate}: checksum computation failed`);
+        skipped.push({ path: candidate, reason: 'checksum' });
+        continue;
+      }
+
+      if (knownChecksums.has(checksum)) {
+        // eslint-disable-next-line no-console -- Log skip reason for debugging.
+        console.log(`Skipping ${candidate}: duplicate checksum ${checksum}`);
+        skipped.push({ path: candidate, reason: 'duplicate' });
+        continue;
+      }
+
+      // eslint-disable-next-line no-console -- Log import attempt for debugging.
+      console.log(`Attempting to import ${candidate} with checksum ${checksum}...`);
+      try {
+        const record = await this.copyAndRegisterImportedFile({
+          sourcePath: candidate,
+          checksum,
+          importFolderAbsolute,
+          folderForJoin,
+          libraryRoot,
+          usedNames
+        });
+        imported.push(record);
+        knownChecksums.add(checksum);
+        knownPaths.add(this.normalizeAbsolutePath(record.absolutePath));
+      } catch (error) {
+        const errorMessage = error instanceof Error ? error.message : String(error);
+        // eslint-disable-next-line no-console -- Log import failures for debugging.
+        console.error(`Failed to import ${candidate}:`, errorMessage);
+        failed.push({
+          path: candidate,
+          message: errorMessage
+        });
+      }
+    }
+
+    if (imported.length > 0) {
+      this.resetMetadataSuggestionsCache();
+      this.search.rebuildIndex();
+    }
+
+    return { imported, skipped, failed };
+  }
+
   /**
    * Renames a file while keeping it in the current directory.
    */
@@ -1342,6 +1495,165 @@ export class LibraryService {
     return value.replace(/\\/g, '/');
   }
 
+  /**
+   * Gathers candidate audio files from the provided sources, handling both folders and individual files.
+   */
+  private async collectImportCandidates(sourcePaths: string[]): Promise<{
+    files: string[];
+    failures: ImportFailureEntry[];
+  }> {
+    const discovered = new Set<string>();
+    const failures: ImportFailureEntry[] = [];
+    const uniqueSources = Array.from(
+      new Set((sourcePaths ?? []).map((entry) => entry?.trim()).filter((entry): entry is string => Boolean(entry)))
+    );
+
+    for (const rawSource of uniqueSources) {
+      const absoluteSource = path.resolve(rawSource);
+      try {
+        const stats = await fs.stat(absoluteSource);
+        if (stats.isDirectory()) {
+          try {
+            const matches = await fg(['**/*.wav', '**/*.wave'], {
+              cwd: absoluteSource,
+              absolute: true,
+              onlyFiles: true,
+              suppressErrors: true,
+              caseSensitiveMatch: false
+            });
+            for (const match of matches) {
+              discovered.add(path.resolve(match));
+            }
+          } catch (error) {
+            failures.push({
+              path: absoluteSource,
+              message: error instanceof Error ? error.message : String(error)
+            });
+          }
+        } else if (stats.isFile()) {
+          discovered.add(absoluteSource);
+        } else {
+          failures.push({ path: absoluteSource, message: 'Unsupported file system entry.' });
+        }
+      } catch (error) {
+        failures.push({
+          path: absoluteSource,
+          message: error instanceof Error ? error.message : String(error)
+        });
+      }
+    }
+
+    const files = Array.from(discovered).sort((a, b) => a.localeCompare(b, undefined, { sensitivity: 'base' }));
+    return { files, failures };
+  }
+
+  /**
+   * Copies a single source file into the library and registers it in the database, returning the stored record.
+   */
+  private async copyAndRegisterImportedFile(options: {
+    sourcePath: string;
+    checksum: string;
+    importFolderAbsolute: string;
+    folderForJoin: string;
+    libraryRoot: string;
+    usedNames: Set<string>;
+  }): Promise<AudioFileSummary> {
+    const { sourcePath, checksum, importFolderAbsolute, folderForJoin, libraryRoot, usedNames } = options;
+    const extension = path.extname(sourcePath);
+    const baseName = path.basename(sourcePath, extension);
+    let sanitizedBase = this.organization.sanitizeCustomName(baseName);
+    if (!sanitizedBase) {
+      sanitizedBase = 'Imported';
+    }
+
+    let attempt = 0;
+    let candidateName: string = '';
+    let candidateAbsolutePath: string = '';
+    while (true) {
+      if (attempt === 0) {
+        candidateName = this.normaliseFileName(`${sanitizedBase}.wav`);
+      } else {
+        const suffix = this.organization.formatSequenceNumber(attempt);
+        candidateName = this.normaliseFileName(`${sanitizedBase}_${suffix}.wav`);
+      }
+
+      if (!usedNames.has(candidateName)) {
+        candidateAbsolutePath = path.join(importFolderAbsolute, candidateName);
+        const exists = await this.pathExists(candidateAbsolutePath);
+        if (!exists) {
+          break;
+        }
+      }
+
+      attempt += 1;
+      if (attempt > 9999) {
+        throw new Error('Unable to allocate a unique filename for the imported file.');
+      }
+    }
+
+    usedNames.add(candidateName);
+    this.assertWithinLibrary(libraryRoot, candidateAbsolutePath);
+
+    await fs.copyFile(sourcePath, candidateAbsolutePath);
+
+    try {
+      const stats = await fs.stat(candidateAbsolutePath);
+      const metadata = await this.extractAudioMetadata(candidateAbsolutePath);
+      const relativePath = this.toLibraryRelativePath(folderForJoin, candidateName);
+      const record = this.database.upsertFile({
+        absolutePath: candidateAbsolutePath,
+        relativePath,
+        fileName: candidateName,
+        displayName: path.basename(candidateName, path.extname(candidateName)),
+        modifiedAt: stats.mtimeMs,
+        createdAt: Number.isNaN(stats.birthtimeMs) ? null : stats.birthtimeMs,
+        size: stats.size,
+        durationMs: metadata.durationMs,
+        sampleRate: metadata.sampleRate,
+        bitDepth: metadata.bitDepth,
+        checksum,
+        tags: metadata.tags,
+        categories: metadata.categories
+      });
+
+      try {
+        const embedded = this.tagService.readMetadata(candidateAbsolutePath);
+        this.updateMetadataSuggestionsCache(embedded.author ?? null);
+      } catch (metadataError) {
+        // eslint-disable-next-line no-console -- Import should continue even if metadata read fails.
+        console.warn('Failed to read metadata from imported file', metadataError);
+      }
+
+      return record;
+    } catch (error) {
+      await fs.rm(candidateAbsolutePath, { force: true }).catch(() => undefined);
+      throw error;
+    }
+  }
+
+  /**
+   * Resolves and caches the music-metadata parseFile implementation.
+   */
+  private async resolveMusicMetadataParser(): Promise<MusicMetadataParser> {
+    if (this.musicMetadataParseFile) {
+      return this.musicMetadataParseFile;
+    }
+
+    const namespace = (await import('music-metadata')) as MusicMetadataNamespace;
+    const candidate = typeof namespace.parseFile === 'function'
+      ? namespace.parseFile
+      : namespace.default && typeof namespace.default.parseFile === 'function'
+        ? namespace.default.parseFile
+        : null;
+
+    if (!candidate) {
+      throw new Error('music-metadata parseFile not found');
+    }
+
+    this.musicMetadataParseFile = candidate;
+    return candidate;
+  }
+
   /**
    * Extracts metadata from the WAV container, falling back to defaults when parsing fails.
    */
@@ -1353,22 +1665,8 @@ export class LibraryService {
     categories: string[];
   }> {
     try {
-      const mmImport = await import('music-metadata');
+      const parseFile = await this.resolveMusicMetadataParser();
-      const mm = (mmImport as { default?: unknown }).default ?? mmImport;
+      const metadata = await parseFile(filePath, { duration: true });
-      
-      const loadMusicMetadata = typeof mm === 'object' && mm !== null && 'loadMusicMetadata' in mm
-        ? (mm as { loadMusicMetadata: () => Promise<{ parseFile: (path: string, opts?: { duration?: boolean }) => Promise<{
-            format: { duration?: number | null; sampleRate?: number | null; bitsPerSample?: number | null };
-            common: { comment?: unknown[]; genre?: unknown[]; subtitle?: unknown };
-          }> }> }).loadMusicMetadata
-        : null;
-      
-      if (!loadMusicMetadata) {
-        throw new Error('music-metadata loadMusicMetadata not found');
-      }
-      
-      const musicMetadata = await loadMusicMetadata();
-      const metadata = await musicMetadata.parseFile(filePath, { duration: true });
       const infoTags = this.tagService.readInfoTags(filePath);
       const splitInfoValues = (input: string | undefined): string[] =>
         input

src/main/services/SearchService.ts

@@ -1,4 +1,4 @@
-import Fuse from 'fuse.js';
+import Fuse, { type FuseResult, type IFuseOptions } from 'fuse.js';
 import { AudioFileSummary } from '../../shared/models';
 import { DatabaseService } from './DatabaseService';
 import { TagService } from './TagService';
@@ -76,7 +76,7 @@ export class SearchService {
 
     return fuseInstance
       .search(remainingQuery)
-      .map((result: Fuse.FuseResult<AudioFileSummary>) => result.item)
+      .map((result: FuseResult<AudioFileSummary>) => result.item)
       .filter((file) => (filters.length === 0 ? true : this.matchesAdvancedFilters(file, filters)));
   }
 
@@ -103,7 +103,7 @@ export class SearchService {
   /**
    * Provides the standard Fuse configuration used by the service.
    */
-  private createFuseOptions(): Fuse.IFuseOptions<AudioFileSummary> {
+  private createFuseOptions(): IFuseOptions<AudioFileSummary> {
     return {
       includeScore: true,
       threshold: 0.35,
@@ -114,7 +114,7 @@ export class SearchService {
         { name: 'tags', weight: 0.2 },
         { name: 'categories', weight: 0.1 }
       ]
-    } satisfies Fuse.IFuseOptions<AudioFileSummary>;
+    } satisfies IFuseOptions<AudioFileSummary>;
   }
 
   /**

src/main/services/TagService.ts

@@ -163,8 +163,8 @@ export class TagService {
         .filter((entry) => entry.length > 0);
 
       const tagText = tagValuesList.length > 0 ? tagValuesList.join('; ') : null;
-      const categoryText = categoryValuesList.length > 0 ? categoryValuesList.join('; ') : null;
+  const categoryText = categoryValuesList.length > 0 ? categoryValuesList.join('; ') : null;
-      const primaryCategory = categoryValuesList.at(0) ?? null;
+  const primaryCategory = categoryValuesList.length > 0 ? categoryValuesList[0] : null;
       const trimmedTitle = metadata.title?.toString().trim();
       const effectiveTitle = trimmedTitle && trimmedTitle.length > 0 ? trimmedTitle : null;
       const trimmedAuthor = metadata.author?.toString().trim();

src/preload/index.ts

@@ -5,6 +5,7 @@ import type {
   AudioBufferPayload,
   AudioFileSummary,
   CategoryRecord,
+  LibraryImportResult,
   LibraryScanSummary,
   SplitSegmentRequest,
   TagUpdatePayload
@@ -26,9 +27,18 @@ const api: RendererApi = {
   async rescanLibrary(): Promise<LibraryScanSummary> {
     return ipcRenderer.invoke(IPC_CHANNELS.libraryScan);
   },
+  async selectImportFolder(): Promise<string | null> {
+    return ipcRenderer.invoke(IPC_CHANNELS.dialogSelectImportFolder);
+  },
+  async listSystemDrives(): Promise<string[]> {
+    return ipcRenderer.invoke(IPC_CHANNELS.systemListDrives);
+  },
   async listAudioFiles(): Promise<AudioFileSummary[]> {
     return ipcRenderer.invoke(IPC_CHANNELS.libraryList);
   },
+  async importExternalSources(paths: string[]): Promise<LibraryImportResult> {
+    return ipcRenderer.invoke(IPC_CHANNELS.libraryImport, paths);
+  },
   /** Retrieves a single audio file summary by id, returning null when the record no longer exists. */
   async getAudioFileById(fileId: number): Promise<AudioFileSummary | null> {
     return ipcRenderer.invoke(IPC_CHANNELS.libraryGetById, fileId);
@@ -87,8 +97,8 @@ const api: RendererApi = {
   ): Promise<void> {
     return ipcRenderer.invoke(IPC_CHANNELS.libraryUpdateMetadata, fileId, metadata);
   },
-  onMenuAction(channel: string, callback: () => void): () => void {
+  onMenuAction(channel: string, callback: (payload?: unknown) => void): () => void {
-    const listener = () => callback();
+    const listener = (_event: Electron.IpcRendererEvent, payload?: unknown) => callback(payload);
     ipcRenderer.on(channel, listener);
     return () => ipcRenderer.removeListener(channel, listener);
   }

src/renderer/src/App.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useMemo, useState } from 'react';
+import { useCallback, useEffect, useMemo, useState, type JSX } from 'react';
 import FileList from './components/FileList';
 import FileDetailPanel from './components/FileDetailPanel';
 import MultiFileEditor from './components/MultiFileEditor';
@@ -10,7 +10,7 @@ import EditModePanel from './components/edit/EditModePanel';
 import { useLibrarySnapshot } from './hooks/useLibrarySnapshot';
 import { loadPlayerFile, usePlayerSnapshot } from './hooks/usePlayerSnapshot';
 import { libraryStore, type CategoryFilterValue } from './stores/LibraryStore';
-import type { AudioFileSummary } from '../../shared/models';
+import type { AudioFileSummary, LibraryImportResult } from '../../shared/models';
 
 type RightPanelTab = 'listen' | 'edit';
 
@@ -25,14 +25,18 @@ function App(): JSX.Element {
   const [showStatusMessage, setShowStatusMessage] = useState(false);
   const [statusFadingOut, setStatusFadingOut] = useState(false);
   const [activeTab, setActiveTab] = useState<RightPanelTab>('listen');
+  const [importMessage, setImportMessage] = useState<string | null>(null);
   
   const statusMessage = useMemo(() => {
+    if (importMessage) {
+      return importMessage;
+    }
     if (!library.lastScan) {
       return null;
     }
     const { added, updated, removed } = library.lastScan;
     return `Scan complete: +${added} updated ${updated} removed ${removed}`;
-  }, [library.lastScan]);
+  }, [importMessage, library.lastScan]);
 
   useEffect(() => {
     if (statusMessage) {
@@ -44,6 +48,7 @@ function App(): JSX.Element {
       const hideTimer = setTimeout(() => {
         setShowStatusMessage(false);
         setStatusFadingOut(false);
+        setImportMessage((current) => (current === statusMessage ? null : current));
       }, 5000);
       return () => {
         clearTimeout(fadeTimer);
@@ -52,18 +57,6 @@ function App(): JSX.Element {
     }
   }, [statusMessage]);
 
-  useEffect(() => {
-    const cleanup1 = window.api.onMenuAction('open-settings', () => setSettingsOpen(true));
-    const cleanup2 = window.api.onMenuAction('rescan-library', handleRescan);
-    const cleanup3 = window.api.onMenuAction('find-duplicates', handleFindDuplicates);
-
-    return () => {
-      cleanup1();
-      cleanup2();
-      cleanup3();
-    };
-  }, []);
-
   const selectedFile = useMemo(
     () => library.files.find((file) => file.id === library.selectedFileId) ?? null,
     [library.files, library.selectedFileId]
@@ -155,14 +148,82 @@ function App(): JSX.Element {
     void libraryStore.search(value);
   };
 
-  const handleRescan = async () => {
+  const handleRescan = useCallback(async () => {
     await libraryStore.rescan();
-  };
+  }, []);
 
-  const handleFindDuplicates = async () => {
+  const handleFindDuplicates = useCallback(async () => {
     const duplicates = await window.api.listDuplicates();
     setDuplicateGroups(duplicates);
-  };
+  }, []);
+
+  const summariseImportResult = useCallback((result: LibraryImportResult): string => {
+    const parts: string[] = [`${result.imported.length} added`];
+    if (result.skipped.length > 0) {
+      parts.push(`${result.skipped.length} skipped`);
+    }
+    if (result.failed.length > 0) {
+      parts.push(`${result.failed.length} failed`);
+    }
+    return `Import complete: ${parts.join(', ')}`;
+  }, []);
+
+  const notifyImportSuccess = useCallback((result: LibraryImportResult) => {
+    setImportMessage(summariseImportResult(result));
+  }, [summariseImportResult]);
+
+  const notifyImportFailure = useCallback(() => {
+    setImportMessage('Import failed. Check logs for details.');
+  }, []);
+
+  const handleImportFromFolder = useCallback(async () => {
+    try {
+      const result = await libraryStore.importFromFolder();
+      if (!result) {
+        return;
+      }
+      notifyImportSuccess(result);
+    } catch (error) {
+      console.error('Import failed', error);
+      notifyImportFailure();
+    }
+  }, [notifyImportFailure, notifyImportSuccess]);
+
+  const handleImportFromDrive = useCallback(async (drive: string) => {
+    try {
+      const result = await libraryStore.importFromDrive(drive);
+      notifyImportSuccess(result);
+    } catch (error) {
+      console.error('Import failed', error);
+      notifyImportFailure();
+    }
+  }, [notifyImportFailure, notifyImportSuccess]);
+
+  useEffect(() => {
+    const cleanup1 = window.api.onMenuAction('open-settings', () => setSettingsOpen(true));
+    const cleanup2 = window.api.onMenuAction('rescan-library', () => {
+      void handleRescan();
+    });
+    const cleanup3 = window.api.onMenuAction('find-duplicates', () => {
+      void handleFindDuplicates();
+    });
+    const cleanup4 = window.api.onMenuAction('import-from-folder', () => {
+      void handleImportFromFolder();
+    });
+    const cleanup5 = window.api.onMenuAction('import-from-drive', (drive) => {
+      if (typeof drive === 'string') {
+        void handleImportFromDrive(drive);
+      }
+    });
+
+    return () => {
+      cleanup1();
+      cleanup2();
+      cleanup3();
+      cleanup4();
+      cleanup5();
+    };
+  }, [handleFindDuplicates, handleImportFromFolder, handleImportFromDrive, handleRescan]);
 
   const handleKeepDuplicate = async (fileIdToKeep: number, fileIdsToDelete: number[]) => {
     await window.api.deleteFiles(fileIdsToDelete);
@@ -211,7 +272,7 @@ function App(): JSX.Element {
       if (element) {
         element.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
       }
-    }, 100);
+    }, 5000);
   };
 
   const handleUpdateCustomName = async (customName: string | null) => {
@@ -274,8 +335,7 @@ function App(): JSX.Element {
     setActiveTab('listen');
   };
 
-  const handleEditModeSplitComplete = async (created: AudioFileSummary[]) => {
+  const handleEditModeSplitComplete = (created: AudioFileSummary[]) => {
-    await libraryStore.rescan();
     setActiveTab('listen');
     if (created.length > 0) {
       libraryStore.selectFile(created[0].id);
@@ -294,6 +354,7 @@ function App(): JSX.Element {
           categories={library.categories}
           files={library.files}
           activeFilter={library.categoryFilter}
+          justSplitIds={library.justSplitFileIds}
           onSelect={handleCategorySelect}
           onDropFiles={handleDropFilesToCategory}
         />

src/renderer/src/components/CategorySidebar.tsx

@@ -1,6 +1,6 @@
 import { useMemo } from 'react';
 import type { AudioFileSummary, CategoryRecord } from '../../../shared/models';
-import { CATEGORY_FILTER_UNTAGGED, type CategoryFilterValue } from '../stores/LibraryStore';
+import { CATEGORY_FILTER_JUST_SPLIT, CATEGORY_FILTER_UNTAGGED, type CategoryFilterValue } from '../stores/LibraryStore';
 import {
   buildCategorySwatch,
   createCategoryStyleVars,
@@ -11,6 +11,8 @@ export interface CategorySidebarProps {
   categories: CategoryRecord[];
   files: AudioFileSummary[];
   activeFilter: CategoryFilterValue;
+  /** Identifiers of files created during the most recent split action. */
+  justSplitIds: number[];
   onSelect(filter: CategoryFilterValue): void;
   onDropFiles?(fileIds: number[], categoryId: string): void;
 }
@@ -37,7 +39,7 @@ function deriveCounts(files: AudioFileSummary[]): {
   };
 }
 
-export function CategorySidebar({ categories, files, activeFilter, onSelect, onDropFiles }: CategorySidebarProps): JSX.Element {
+export function CategorySidebar({ categories, files, activeFilter, justSplitIds, onSelect, onDropFiles }: CategorySidebarProps): JSX.Element {
   const { total, untagged, categoryCounts } = deriveCounts(files);
   const swatchMap = useMemo(() => {
     const map = new Map<string, ReturnType<typeof buildCategorySwatch>>();
@@ -103,6 +105,17 @@ export function CategorySidebar({ categories, files, activeFilter, onSelect, onD
           <span className="category-sidebar__label">TO TAG</span>
           <span className="category-sidebar__count">{untagged}</span>
         </button>
+        {justSplitIds.length > 0 ? (
+          <button
+            type="button"
+            className="category-sidebar__item"
+            data-active={activeFilter === CATEGORY_FILTER_JUST_SPLIT}
+            onClick={() => handleSelect(CATEGORY_FILTER_JUST_SPLIT)}
+          >
+            <span className="category-sidebar__label">JUST SPLIT</span>
+            <span className="category-sidebar__count">{justSplitIds.length}</span>
+          </button>
+        ) : null}
       </div>
       {sortedGroups.map(([groupName, records]) => {
         const sortedRecords = records

src/renderer/src/components/DrivePickerDialog.tsx

@@ -0,0 +1,78 @@
+import type { JSX } from 'react';
+
+export interface DrivePickerDialogProps {
+  drives: string[];
+  loading: boolean;
+  importing: boolean;
+  error: string | null;
+  onRefresh(): void;
+  onSelect(drivePath: string): void;
+  onClose(): void;
+}
+
+/**
+ * Modal dialog that lists available system drives for import selection.
+ */
+export function DrivePickerDialog({
+  drives,
+  loading,
+  importing,
+  error,
+  onRefresh,
+  onSelect,
+  onClose
+}: DrivePickerDialogProps): JSX.Element {
+  const handleBackdropClick = () => {
+    if (!importing && !loading) {
+      onClose();
+    }
+  };
+
+  return (
+    <div className="modal-overlay" onClick={handleBackdropClick}>
+      <div className="modal-content drive-picker" onClick={(event) => event.stopPropagation()}>
+        <header className="drive-picker__header">
+          <h2>Import From Drive</h2>
+          <p>Select a drive to copy new WAV files into your library.</p>
+        </header>
+
+        {error ? <div className="drive-picker__error">{error}</div> : null}
+
+        <div className="drive-picker__body">
+          {loading ? (
+            <p className="drive-picker__status">Loading available drives…</p>
+          ) : drives.length === 0 ? (
+            <p className="drive-picker__status">No drives were detected.</p>
+          ) : (
+            <ul className="drive-picker__list">
+              {drives.map((drive) => (
+                <li key={drive}>
+                  <button
+                    type="button"
+                    className="drive-picker__drive"
+                    onClick={() => onSelect(drive)}
+                    disabled={importing}
+                  >
+                    <span className="drive-picker__drive-label">{drive}</span>
+                    <span className="drive-picker__drive-hint">Press Enter to import from this drive</span>
+                  </button>
+                </li>
+              ))}
+            </ul>
+          )}
+        </div>
+
+        <footer className="drive-picker__footer">
+          <button type="button" className="ghost-button" onClick={onRefresh} disabled={loading || importing}>
+            Refresh Drives
+          </button>
+          <button type="button" className="ghost-button" onClick={onClose} disabled={importing}>
+            Close
+          </button>
+        </footer>
+      </div>
+    </div>
+  );
+}
+
+export default DrivePickerDialog;

src/renderer/src/stores/LibraryStore.ts

@@ -2,6 +2,7 @@ import type {
   AppSettings,
   AudioFileSummary,
   CategoryRecord,
+  LibraryImportResult,
   LibraryScanSummary,
   SplitSegmentRequest,
   TagUpdatePayload
@@ -10,7 +11,9 @@ import type {
 type ChangeListener = () => void;
 
 export const CATEGORY_FILTER_UNTAGGED = 'untagged' as const;
-export type CategoryFilterValue = string | typeof CATEGORY_FILTER_UNTAGGED | null;
+/** Filter key that exposes files generated by the most recent split action. */
+export const CATEGORY_FILTER_JUST_SPLIT = 'just-split' as const;
+export type CategoryFilterValue = string | typeof CATEGORY_FILTER_UNTAGGED | typeof CATEGORY_FILTER_JUST_SPLIT | null;
 
 export interface LibrarySnapshot {
   initialized: boolean;
@@ -25,6 +28,8 @@ export interface LibrarySnapshot {
   categoryFilter: CategoryFilterValue;
   lastScan: LibraryScanSummary | null;
   metadataSuggestionsVersion: number;
+  /** Files created by the most recent split action during this app session. */
+  justSplitFileIds: number[];
 }
 
 /**
@@ -43,7 +48,8 @@ export class LibraryStore extends EventTarget {
     searchQuery: '',
     categoryFilter: null,
     lastScan: null,
-    metadataSuggestionsVersion: 0
+    metadataSuggestionsVersion: 0,
+    justSplitFileIds: []
   };
 
   /**
@@ -55,8 +61,8 @@ export class LibraryStore extends EventTarget {
       window.api.listCategories(),
       window.api.listAudioFiles()
     ]);
-    const firstFileId = files.at(0)?.id ?? null;
+  const firstFileId = files[0]?.id ?? null;
-    const firstFile = files.at(0) ?? null;
+  const firstFile = files[0] ?? null;
     const nextVersion = this.snapshot.metadataSuggestionsVersion + 1;
     this.snapshot = {
       initialized: true,
@@ -70,7 +76,8 @@ export class LibraryStore extends EventTarget {
       searchQuery: '',
       categoryFilter: null,
       lastScan: null,
-      metadataSuggestionsVersion: nextVersion
+      metadataSuggestionsVersion: nextVersion,
+      justSplitFileIds: []
     };
     this.refreshVisibleFiles(this.snapshot.selectedFileId ?? null);
   }
@@ -246,7 +253,7 @@ export class LibraryStore extends EventTarget {
       ...this.snapshot,
       files: results,
       searchQuery: query,
-      selectedFileId: results.at(0)?.id ?? null,
+  selectedFileId: results[0]?.id ?? null,
       focusedFile: this.snapshot.focusedFile
     };
     this.refreshVisibleFiles(this.snapshot.selectedFileId ?? null);
@@ -263,7 +270,10 @@ export class LibraryStore extends EventTarget {
     };
     
     let visible: AudioFileSummary[];
-    if (filter === CATEGORY_FILTER_UNTAGGED) {
+    if (filter === CATEGORY_FILTER_JUST_SPLIT) {
+      const justSplitIds = new Set(this.snapshot.justSplitFileIds);
+      visible = files.filter((file) => justSplitIds.has(file.id));
+    } else if (filter === CATEGORY_FILTER_UNTAGGED) {
       visible = files.filter((file) => file.categories.length === 0);
     } else if (filter) {
       visible = files.filter((file) => file.categories.includes(filter));
@@ -275,7 +285,8 @@ export class LibraryStore extends EventTarget {
       ...this.snapshot,
       visibleFiles: visible,
       selectedFileId,
-      focusedFile
+      focusedFile,
+      justSplitFileIds: this.snapshot.justSplitFileIds
     };
     this.emitChange();
   }
@@ -289,7 +300,7 @@ export class LibraryStore extends EventTarget {
     this.snapshot = {
       ...this.snapshot,
       files,
-      selectedFileId: files.at(0)?.id ?? null,
+  selectedFileId: files[0]?.id ?? null,
       lastScan: summary,
       focusedFile: this.snapshot.focusedFile,
       metadataSuggestionsVersion: this.snapshot.metadataSuggestionsVersion + 1
@@ -298,6 +309,44 @@ export class LibraryStore extends EventTarget {
     return summary;
   }
 
+  /**
+   * Prompts the user to select a folder and imports audio files from it.
+   */
+  public async importFromFolder(): Promise<LibraryImportResult | null> {
+    const folder = await window.api.selectImportFolder();
+    if (!folder) {
+      return null;
+    }
+    return this.executeImport([folder]);
+  }
+
+  /**
+   * Imports from a drive path, refreshing local caches when new files are added.
+   */
+  public async importFromDrive(drivePath: string): Promise<LibraryImportResult> {
+    return this.executeImport([drivePath]);
+  }
+
+  private async executeImport(sources: string[]): Promise<LibraryImportResult> {
+    const trimmed = sources.map((entry) => entry.trim()).filter((entry) => entry.length > 0);
+    if (trimmed.length === 0) {
+      return { imported: [], skipped: [], failed: [] };
+    }
+
+    const result = await window.api.importExternalSources(trimmed);
+    if (result.imported.length > 0) {
+      const files = await window.api.listAudioFiles();
+  const preferredId = result.imported[0]?.id ?? this.snapshot.selectedFileId ?? null;
+      this.snapshot = {
+        ...this.snapshot,
+        files,
+        metadataSuggestionsVersion: this.snapshot.metadataSuggestionsVersion + 1
+      };
+      this.refreshVisibleFiles(preferredId ?? undefined);
+    }
+    return result;
+  }
+
   /**
    * Applies tag mutations to both the backend and the cached snapshot.
    */
@@ -398,21 +447,29 @@ export class LibraryStore extends EventTarget {
   public async splitFile(fileId: number, segments: SplitSegmentRequest[]): Promise<AudioFileSummary[]> {
     const created = await window.api.splitFile(fileId, segments);
     const files = await window.api.listAudioFiles();
-    const { categoryFilter } = this.snapshot;
+    const createdIds = created.map((record) => record.id);
-    let visible: AudioFileSummary[];
+    const fileLookup = new Map(files.map((record) => [record.id, record] as const));
-    if (categoryFilter === CATEGORY_FILTER_UNTAGGED) {
+    // Prefer fresh copies from the library list so downstream consumers see current metadata.
-      visible = files.filter((file) => file.categories.length === 0);
+    const justSplitRecords: AudioFileSummary[] = createdIds
-    } else if (categoryFilter) {
+      .map((id) => fileLookup.get(id) ?? created.find((record) => record.id === id) ?? null)
-      visible = files.filter((file) => file.categories.includes(categoryFilter));
+      .filter((record): record is AudioFileSummary => record !== null);
-    } else {
+
-      visible = files.slice();
+  const primaryId = justSplitRecords[0]?.id ?? null;
+    const nextSelection = new Set<number>(justSplitRecords.map((record) => record.id));
+    if (primaryId !== null) {
+      nextSelection.add(primaryId);
     }
 
     this.snapshot = {
       ...this.snapshot,
       files,
-      visibleFiles: visible,
+      visibleFiles: justSplitRecords,
-      metadataSuggestionsVersion: this.snapshot.metadataSuggestionsVersion + 1
+      metadataSuggestionsVersion: this.snapshot.metadataSuggestionsVersion + 1,
+      categoryFilter: CATEGORY_FILTER_JUST_SPLIT,
+      justSplitFileIds: justSplitRecords.map((record) => record.id),
+      selectedFileId: primaryId,
+      selectedFileIds: nextSelection,
+  focusedFile: primaryId !== null ? fileLookup.get(primaryId) ?? justSplitRecords[0] ?? null : null
     };
     this.emitChange();
     return created;
@@ -428,7 +485,7 @@ export class LibraryStore extends EventTarget {
       ...this.snapshot,
       settings,
       files,
-      selectedFileId: files.at(0)?.id ?? null,
+  selectedFileId: files[0]?.id ?? null,
       categoryFilter: null,
       focusedFile: this.snapshot.focusedFile,
       metadataSuggestionsVersion: this.snapshot.metadataSuggestionsVersion + 1
@@ -462,8 +519,13 @@ export class LibraryStore extends EventTarget {
 
   private refreshVisibleFiles(preferredId?: number | null, emit = true): void {
     const { files, categoryFilter } = this.snapshot;
+    const availableIds = new Set(files.map((file) => file.id));
+    const justSplitIds = this.snapshot.justSplitFileIds.filter((id) => availableIds.has(id));
     let visible: AudioFileSummary[];
-    if (categoryFilter === CATEGORY_FILTER_UNTAGGED) {
+    if (categoryFilter === CATEGORY_FILTER_JUST_SPLIT) {
+      const justSplitSet = new Set(justSplitIds);
+      visible = files.filter((file) => justSplitSet.has(file.id));
+    } else if (categoryFilter === CATEGORY_FILTER_UNTAGGED) {
       visible = files.filter((file) => file.categories.length === 0);
     } else if (categoryFilter) {
       visible = files.filter((file) => file.categories.includes(categoryFilter));
@@ -500,7 +562,8 @@ export class LibraryStore extends EventTarget {
       visibleFiles: visible,
       selectedFileId: nextSelected,
       selectedFileIds: nextSelectionSet,
-      focusedFile: nextFocused
+      focusedFile: nextFocused,
+      justSplitFileIds: justSplitIds
     };
 
     if (emit) {
@@ -518,7 +581,7 @@ export class LibraryStore extends EventTarget {
       }
     }
     if (enforceVisible) {
-      return visible.at(0)?.id ?? null;
+  return visible[0]?.id ?? null;
     }
     return desiredId;
   }

src/renderer/src/styles/app.css

@@ -174,6 +174,95 @@ body {
   color: inherit;
 }
 
+.drive-picker {
+  width: min(28rem, 90vw);
+  display: flex;
+  flex-direction: column;
+  gap: 1.25rem;
+}
+
+.drive-picker__header h2 {
+  margin: 0 0 0.35rem 0;
+  font-size: 1.4rem;
+}
+
+.drive-picker__header p {
+  margin: 0;
+  opacity: 0.75;
+  font-size: 0.95rem;
+}
+
+.drive-picker__error {
+  padding: 0.75rem 1rem;
+  border-radius: 0.6rem;
+  background: rgba(220, 97, 97, 0.12);
+  border: 1px solid rgba(220, 97, 97, 0.35);
+  color: #f5d6d6;
+  font-size: 0.9rem;
+}
+
+.drive-picker__body {
+  min-height: 6rem;
+}
+
+.drive-picker__status {
+  margin: 0;
+  opacity: 0.75;
+}
+
+.drive-picker__list {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 0.75rem;
+}
+
+.drive-picker__drive {
+  width: 100%;
+  display: flex;
+  flex-direction: column;
+  align-items: flex-start;
+  gap: 0.3rem;
+  padding: 0.7rem 0.9rem;
+  border-radius: 0.6rem;
+  border: 1px solid rgba(255, 255, 255, 0.12);
+  background: rgba(255, 255, 255, 0.06);
+  color: inherit;
+  font: inherit;
+  cursor: pointer;
+  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
+}
+
+.drive-picker__drive:hover:not(:disabled),
+.drive-picker__drive:focus-visible {
+  transform: translateY(-1px);
+  background: rgba(255, 255, 255, 0.12);
+  border-color: rgba(255, 255, 255, 0.3);
+}
+
+.drive-picker__drive:disabled {
+  opacity: 0.6;
+  cursor: default;
+}
+
+.drive-picker__drive-label {
+  font-weight: 600;
+  font-size: 1rem;
+}
+
+.drive-picker__drive-hint {
+  font-size: 0.8rem;
+  opacity: 0.7;
+}
+
+.drive-picker__footer {
+  display: flex;
+  justify-content: flex-end;
+  gap: 0.75rem;
+}
+
 .status-banner {
   text-align: center;
   padding: 0.25rem 1rem;

src/shared/ipc.ts

@@ -3,6 +3,8 @@ export const IPC_CHANNELS = {
   settingsGet: 'settings:get',
   settingsSetLibrary: 'settings:set-library',
   dialogSelectLibrary: 'dialog:select-library',
+  dialogSelectImportFolder: 'dialog:select-import-folder',
+  systemListDrives: 'system:list-drives',
   libraryScan: 'library:scan',
   libraryList: 'library:list',
   libraryGetById: 'library:get-by-id',
@@ -19,6 +21,7 @@ export const IPC_CHANNELS = {
   libraryMetadataSuggestions: 'library:metadata-suggestions',
   libraryUpdateMetadata: 'library:update-metadata',
   libraryWaveformPreview: 'library:waveform-preview',
+  libraryImport: 'library:import',
   tagsUpdate: 'tags:update',
   categoriesList: 'categories:list',
   searchQuery: 'search:query'
@@ -38,8 +41,14 @@ export interface RendererApi {
   setLibraryPath(path: string): Promise<import('./models').AppSettings>;
   /** Triggers a manual rescan of the library. */
   rescanLibrary(): Promise<import('./models').LibraryScanSummary>;
+  /** Opens a dialog to pick a folder to import audio from. */
+  selectImportFolder(): Promise<string | null>;
+  /** Lists available system drives for drive-level imports. */
+  listSystemDrives(): Promise<string[]>;
   /** Fetches the current list of audio files. */
   listAudioFiles(): Promise<import('./models').AudioFileSummary[]>;
+  /** Imports external audio files into the library. */
+  importExternalSources(paths: string[]): Promise<import('./models').LibraryImportResult>;
   /** Retrieves a single audio file summary by id, or null if it cannot be resolved. */
   getAudioFileById(fileId: number): Promise<import('./models').AudioFileSummary | null>;
   /** Fetches groups of duplicate files based on checksum. */
@@ -81,7 +90,7 @@ export interface RendererApi {
     metadata: { author?: string | null; copyright?: string | null; rating?: number }
   ): Promise<void>;
   /** Listens for menu actions from the main process. Returns a cleanup function. */
-  onMenuAction(channel: string, callback: () => void): () => void;
+  onMenuAction(channel: string, callback: (payload?: unknown) => void): () => void;
 }
 
 declare global {

src/shared/models.ts

@@ -78,6 +78,35 @@ export interface LibraryScanSummary {
   total: number;
 }
 
+/** Enumerates reasons why an import candidate might be skipped. */
+export type ImportSkipReason = 'duplicate' | 'checksum' | 'unsupported' | 'inside-library';
+
+/** Describes a source entry that was skipped during an import run. */
+export interface ImportSkipEntry {
+  /** Absolute path of the skipped file. */
+  path: string;
+  /** Reason the file did not qualify for import. */
+  reason: ImportSkipReason;
+}
+
+/** Records a failure encountered while processing an import candidate. */
+export interface ImportFailureEntry {
+  /** Absolute path of the problematic file or directory. */
+  path: string;
+  /** Human-readable message explaining the failure. */
+  message: string;
+}
+
+/** Summary returned after importing external audio sources. */
+export interface LibraryImportResult {
+  /** Files successfully copied into the library. */
+  imported: AudioFileSummary[];
+  /** Candidates that were skipped with a known reason. */
+  skipped: ImportSkipEntry[];
+  /** Candidates that failed due to unexpected errors. */
+  failed: ImportFailureEntry[];
+}
+
 /**
  * Shape of persisted application settings.
  */