How to list files/folder from internal or SD card storage in Flutter App

In this example, we have shown to list all the files or folders from Internal or External (SD Card) storage. You can also add an extension filter to list files with specific path extension. This type of functionality is very important for a PDF viewer, image viewer, or audio player apps.

To list all the files or folders, you have to use flutter_file_manager, path, and path_provider_ex flutter package. Add the following lines in your pubspec.yaml file to add this package in your dependency.

    sdk: flutter
  path: ^1.6.4
  path_provider_ex: ^1.0.1
  flutter_file_manager: ^0.2.0

Add dd read / write permissions in your android/app/src/main/AndroidManifest.xml before <application> tag.

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

If you still get the Permission Denied error, add the following line on AndroidManifest.xml file.


Flutter dart code, see the explanation in the comment.

import 'dart:io';
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_file_manager/flutter_file_manager.dart';
import 'package:path_provider_ex/path_provider_ex.dart';
//import package files

void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
  Widget build(BuildContext context) {
    return  MaterialApp(
          home: MyFileList(), //call MyFile List 

//apply this class on home: attribute at MaterialApp()
class MyFileList extends StatefulWidget{
  State<StatefulWidget> createState() {
    return _MyFileList();

class _MyFileList extends State<MyFileList>{
  var files;
  void getFiles() async { //asyn function to get list of files
      List<StorageInfo> storageInfo = await PathProviderEx.getStorageInfo();
      var root = storageInfo[0].rootDir; //storageInfo[1] for SD card, geting the root directory
      var fm = FileManager(root: Directory(root)); //
      files = await fm.filesTree( 
      //set fm.dirsTree() for directory/folder tree list
        excludedPaths: ["/storage/emulated/0/Android"],
        extensions: ["png", "pdf"] //optional, to filter files, remove to list all,
        //remove this if your are grabbing folder list
      setState(() {}); //update the UI

  void initState() {
    getFiles(); //call getFiles() function on initial state. 

  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title:Text("File/Folder list from SD Card"),
        backgroundColor: Colors.redAccent
      body:files == null? Text("Searching Files"):
           ListView.builder(  //if file/folder list is grabbed, then show here
              itemCount: files?.length ?? 0,
              itemBuilder: (context, index) {
                    return Card(
                         title: Text(files[index].path.split('/').last),
                         leading: Icon(Icons.image),
                         trailing: Icon(Icons.delete, color: Colors.redAccent,),


In this way, you can list all the files or folders from Internal or External (SD card) storage and show in your app.

2 Comments on this Article


Thanks a lot for this article

3 months ago

Krishna Dhakal

Thank you very much Flutter Campus for awesome guide articles. It is helping me a lot. I’m happy to find this website.

3 months ago

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