diff --git a/apps/readest-app/src/app/library/page.tsx b/apps/readest-app/src/app/library/page.tsx
index 585e6f4c..5c5509f8 100644
--- a/apps/readest-app/src/app/library/page.tsx
+++ b/apps/readest-app/src/app/library/page.tsx
@@ -164,9 +164,11 @@ const LibraryPageContent = ({ searchParams }: { searchParams: ReadonlyURLSearchP
 
   useEffect(() => {
     const libraryPage = document.querySelector('.library-page');
-    libraryPage?.addEventListener('dragover', handleDragOver as unknown as EventListener);
-    libraryPage?.addEventListener('dragleave', handleDragLeave as unknown as EventListener);
-    libraryPage?.addEventListener('drop', handleDrop as unknown as EventListener);
+    if (!appService?.isMobile) {
+      libraryPage?.addEventListener('dragover', handleDragOver as unknown as EventListener);
+      libraryPage?.addEventListener('dragleave', handleDragLeave as unknown as EventListener);
+      libraryPage?.addEventListener('drop', handleDrop as unknown as EventListener);
+    }
 
     if (isTauriAppPlatform()) {
       const unlisten = getCurrentWebview().onDragDropEvent((event) => {
@@ -185,9 +187,11 @@ const LibraryPageContent = ({ searchParams }: { searchParams: ReadonlyURLSearchP
     }
 
     return () => {
-      libraryPage?.removeEventListener('dragover', handleDragOver as unknown as EventListener);
-      libraryPage?.removeEventListener('dragleave', handleDragLeave as unknown as EventListener);
-      libraryPage?.removeEventListener('drop', handleDrop as unknown as EventListener);
+      if (!appService?.isMobile) {
+        libraryPage?.removeEventListener('dragover', handleDragOver as unknown as EventListener);
+        libraryPage?.removeEventListener('dragleave', handleDragLeave as unknown as EventListener);
+        libraryPage?.removeEventListener('drop', handleDrop as unknown as EventListener);
+      }
     };
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [pageRef.current]);
@@ -337,7 +341,8 @@ const LibraryPageContent = ({ searchParams }: { searchParams: ReadonlyURLSearchP
   const selectFilesTauri = async () => {
     const exts = appService?.isAndroidApp ? [] : SUPPORTED_FILE_EXTS;
     const files = (await appService?.selectFiles(_('Select Books'), exts)) || [];
-    return files.filter((file) => SUPPORTED_FILE_EXTS.some((ext) => file.endsWith(`.${ext}`)));
+    // Cannot filter out files on Android since some content providers may not return the file name
+    return files;
   };
 
   const selectFilesWeb = () => {
diff --git a/apps/readest-app/src/services/appService.ts b/apps/readest-app/src/services/appService.ts
index 4a5d5cf1..93715f8f 100644
--- a/apps/readest-app/src/services/appService.ts
+++ b/apps/readest-app/src/services/appService.ts
@@ -1,4 +1,4 @@
-import { AppPlatform, AppService, ToastType } from '@/types/system';
+import { AppPlatform, AppService } from '@/types/system';
 
 import { SystemSettings } from '@/types/settings';
 import { FileSystem, BaseDir } from '@/types/system';
@@ -62,13 +62,9 @@ export abstract class BaseAppService implements AppService {
   abstract getCoverImageUrl(book: Book): string;
   abstract getCoverImageBlobUrl(book: Book): Promise<string>;
   abstract getInitBooksDir(): Promise<string>;
+  abstract getCacheDir(): Promise<string>;
+  abstract selectDirectory(): Promise<string>;
   abstract selectFiles(name: string, extensions: string[]): Promise<string[]>;
-  abstract showMessage(
-    msg: string,
-    kind?: ToastType,
-    title?: string,
-    okLabel?: string,
-  ): Promise<void>;
 
   async loadSettings(): Promise<SystemSettings> {
     let settings: SystemSettings;
@@ -118,9 +114,12 @@ export abstract class BaseAppService implements AppService {
     }
 
     this.localBooksDir = settings.localBooksDir;
+    const cacheDir = await this.getCacheDir();
     this.fs.getPrefix = (baseDir: BaseDir) => {
       if (baseDir === 'Books') {
         return this.localBooksDir;
+      } else if (baseDir === 'Cache') {
+        return cacheDir;
       }
       return null;
     };
diff --git a/apps/readest-app/src/services/nativeAppService.ts b/apps/readest-app/src/services/nativeAppService.ts
index 1f3e0994..deafdd48 100644
--- a/apps/readest-app/src/services/nativeAppService.ts
+++ b/apps/readest-app/src/services/nativeAppService.ts
@@ -13,12 +13,12 @@ import {
   WriteFileOptions,
 } from '@tauri-apps/plugin-fs';
 import { convertFileSrc } from '@tauri-apps/api/core';
-import { open as openDialog, message } from '@tauri-apps/plugin-dialog';
-import { join, appDataDir } from '@tauri-apps/api/path';
+import { open as openDialog } from '@tauri-apps/plugin-dialog';
+import { join, appDataDir, appCacheDir } from '@tauri-apps/api/path';
 import { type as osType } from '@tauri-apps/plugin-os';
 
 import { Book } from '@/types/book';
-import { ToastType, FileSystem, BaseDir, AppPlatform } from '@/types/system';
+import { FileSystem, BaseDir, AppPlatform } from '@/types/system';
 import { isContentURI, isValidURL } from '@/utils/misc';
 import { getCoverFilename, getFilename } from '@/utils/book';
 import { copyURIToPath } from '@/utils/bridge';
@@ -80,7 +80,22 @@ export const nativeFileSystem: FileSystem = {
     if (isValidURL(path)) {
       return await new RemoteFile(path, name).open();
     } else if (isContentURI(path)) {
-      return await new NativeFile(fp, fname, base ? baseDir : null).open();
+      if (path.includes('com.android.externalstorage')) {
+        // If the URI is from shared internal storage (like /storage/emulated/0),
+        // we can access it directly using the path — no need to copy.
+        return await new NativeFile(fp, fname, base ? baseDir : null).open();
+      } else {
+        // Otherwise, for content:// URIs (e.g. from MediaStore, Drive, or third-party apps),
+        // we cannot access the file directly — so we copy it to a temporary cache location.
+        const prefix = this.getPrefix('Cache');
+        const dst = `${prefix}/${fname}`;
+        const res = await copyURIToPath({ uri: path, dst });
+        if (!res.success) {
+          console.error('Failed to open file:', res);
+          throw new Error('Failed to open file');
+        }
+        return await new NativeFile(dst, fname, base ? baseDir : null).open();
+      }
     } else {
       const prefix = this.getPrefix(base);
       if (prefix && OS_TYPE !== 'android') {
@@ -213,6 +228,18 @@ export class NativeAppService extends BaseAppService {
     return join(await appDataDir(), LOCAL_BOOKS_SUBDIR);
   }
 
+  async getCacheDir(): Promise<string> {
+    return await appCacheDir();
+  }
+
+  async selectDirectory(): Promise<string> {
+    const selected = await openDialog({
+      directory: true,
+      multiple: false,
+    });
+    return selected as string;
+  }
+
   async selectFiles(name: string, extensions: string[]): Promise<string[]> {
     const selected = await openDialog({
       multiple: true,
@@ -221,15 +248,6 @@ export class NativeAppService extends BaseAppService {
     return Array.isArray(selected) ? selected : selected ? [selected] : [];
   }
 
-  async showMessage(
-    msg: string,
-    kind: ToastType = 'info',
-    title?: string,
-    okLabel?: string,
-  ): Promise<void> {
-    await message(msg, { kind, title, okLabel });
-  }
-
   getCoverImageUrl = (book: Book): string => {
     return this.fs.getURL(`${this.localBooksDir}/${getCoverFilename(book)}`);
   };
diff --git a/apps/readest-app/src/services/webAppService.ts b/apps/readest-app/src/services/webAppService.ts
index 8cde13da..aee4f803 100644
--- a/apps/readest-app/src/services/webAppService.ts
+++ b/apps/readest-app/src/services/webAppService.ts
@@ -1,5 +1,5 @@
 import { Book } from '@/types/book';
-import { ToastType, FileSystem, BaseDir, AppPlatform } from '@/types/system';
+import { FileSystem, BaseDir, AppPlatform } from '@/types/system';
 import { getCoverFilename } from '@/utils/book';
 import { getOSPlatform, isValidURL } from '@/utils/misc';
 import { RemoteFile } from '@/utils/file';
@@ -212,6 +212,10 @@ export class WebAppService extends BaseAppService {
     return LOCAL_BOOKS_SUBDIR;
   }
 
+  async getCacheDir(): Promise<string> {
+    return 'Cache';
+  }
+
   async selectDirectory(): Promise<string> {
     throw new Error('selectDirectory is not supported in browser');
   }
@@ -220,10 +224,6 @@ export class WebAppService extends BaseAppService {
     throw new Error('selectFiles is not supported in browser');
   }
 
-  async showMessage(msg: string, kind: ToastType = 'info'): Promise<void> {
-    alert(`${kind.toUpperCase()}: ${msg}`);
-  }
-
   getCoverImageUrl = (book: Book): string => {
     return this.fs.getURL(`${LOCAL_BOOKS_SUBDIR}/${getCoverFilename(book)}`);
   };
diff --git a/apps/readest-app/src/types/system.ts b/apps/readest-app/src/types/system.ts
index e3380d41..4b9863c9 100644
--- a/apps/readest-app/src/types/system.ts
+++ b/apps/readest-app/src/types/system.ts
@@ -5,7 +5,6 @@ import { ProgressHandler } from '@/utils/transfer';
 
 export type AppPlatform = 'web' | 'tauri';
 export type BaseDir = 'Books' | 'Settings' | 'Data' | 'Log' | 'Cache' | 'None';
-export type ToastType = 'info' | 'warning' | 'error';
 
 export interface FileSystem {
   getURL(path: string): string;
@@ -39,9 +38,8 @@ export interface AppService {
   isAndroidApp: boolean;
   isIOSApp: boolean;
 
+  selectDirectory(): Promise<string>;
   selectFiles(name: string, extensions: string[]): Promise<string[]>;
-  showMessage(msg: string, kind?: ToastType, title?: string, okLabel?: string): Promise<void>;
-
   loadSettings(): Promise<SystemSettings>;
   saveSettings(settings: SystemSettings): Promise<void>;
   importBook(