diff --git a/src/components/Folder/index.tsx b/src/components/Folder/index.tsx
index ed378870..e731cd54 100644
--- a/src/components/Folder/index.tsx
+++ b/src/components/Folder/index.tsx
@@ -60,6 +60,10 @@ interface FileInfo {
   isRemote?: boolean;
 }
 
+const AUDIO_EXTENSIONS = ['mp3', 'wav', 'ogg', 'flac', 'aac', 'm4a', 'wma'];
+const VIDEO_EXTENSIONS = ['mp4', 'webm', 'ogv', 'mov', 'avi', 'mkv'];
+const MEDIA_EXTENSIONS = [...AUDIO_EXTENSIONS, ...VIDEO_EXTENSIONS];
+
 // FileTree component to render nested file structure
 interface FileTreeProps {
   node: FileTreeNode;
@@ -222,24 +226,7 @@ export default function Folder({ data: _data }: { data?: Agent }) {
     console.log('file', JSON.parse(JSON.stringify(file)));
 
     // For PDF and audio/video files, use data URL instead of custom protocol
-    if (
-      [
-        'pdf',
-        'mp3',
-        'wav',
-        'ogg',
-        'flac',
-        'aac',
-        'm4a',
-        'wma',
-        'mp4',
-        'webm',
-        'ogv',
-        'mov',
-        'avi',
-        'mkv',
-      ].includes(file.type?.toLowerCase())
-    ) {
+    if (['pdf', ...MEDIA_EXTENSIONS].includes(file.type?.toLowerCase())) {
       window.ipcRenderer
         .invoke('read-file-dataurl', file.path)
         .then((dataUrl: string) => {
@@ -679,7 +666,7 @@ export default function Folder({ data: _data }: { data?: Agent }) {
                   <div className="flex h-full items-center justify-center">
                     <ImageLoader selectedFile={selectedFile} />
                   </div>
-                ) : ['mp3', 'wav', 'ogg', 'flac', 'aac', 'm4a', 'wma'].includes(
+                ) : AUDIO_EXTENSIONS.includes(
                     selectedFile.type.toLowerCase()
                   ) ? (
                   <div className="flex h-full items-center justify-center">
@@ -691,7 +678,7 @@ export default function Folder({ data: _data }: { data?: Agent }) {
                       {t('folder.audio-not-supported')}
                     </audio>
                   </div>
-                ) : ['mp4', 'webm', 'ogv', 'mov', 'avi', 'mkv'].includes(
+                ) : VIDEO_EXTENSIONS.includes(
                     selectedFile.type.toLowerCase()
                   ) ? (
                   <div className="flex h-full items-center justify-center">
diff --git a/test/unit/electron/main/fileReader.test.ts b/test/unit/electron/main/fileReader.test.ts
index c5ef79b6..991ca121 100644
--- a/test/unit/electron/main/fileReader.test.ts
+++ b/test/unit/electron/main/fileReader.test.ts
@@ -277,6 +277,48 @@ describe('File Operations and Utilities', () => {
     });
   });
 
+  describe('Multimedia File Type Detection', () => {
+    const audioExtensions = ['mp3', 'wav', 'ogg', 'flac', 'aac', 'm4a', 'wma'];
+    const videoExtensions = ['mp4', 'webm', 'ogv', 'mov', 'avi', 'mkv'];
+    const mediaExtensions = [...audioExtensions, ...videoExtensions];
+
+    it('should recognize audio file extensions', () => {
+      audioExtensions.forEach((ext) => {
+        const filePath = `/path/to/file.${ext}`;
+        const fileExt = path.extname(filePath).slice(1);
+        expect(mediaExtensions).toContain(fileExt);
+      });
+    });
+
+    it('should recognize video file extensions', () => {
+      videoExtensions.forEach((ext) => {
+        const filePath = `/path/to/file.${ext}`;
+        const fileExt = path.extname(filePath).slice(1);
+        expect(mediaExtensions).toContain(fileExt);
+      });
+    });
+
+    it('should not treat non-media files as multimedia', () => {
+      const nonMediaExtensions = ['txt', 'json', 'csv', 'html', 'py', 'js'];
+      nonMediaExtensions.forEach((ext) => {
+        const isMedia = mediaExtensions.includes(ext);
+        expect(isMedia).toBe(false);
+      });
+    });
+
+    it('should distinguish audio from video extensions', () => {
+      audioExtensions.forEach((ext) => {
+        expect(audioExtensions).toContain(ext);
+        expect(videoExtensions).not.toContain(ext);
+      });
+
+      videoExtensions.forEach((ext) => {
+        expect(videoExtensions).toContain(ext);
+        expect(audioExtensions).not.toContain(ext);
+      });
+    });
+  });
+
   describe('File Content Processing', () => {
     it('should process text file content', () => {
       const content = 'Line 1\nLine 2\nLine 3';