diff --git a/go/mobile/bind-android-debug.sh b/go/mobile/bind-android-debug.sh
index bbca168..e117d21 100644
--- a/go/mobile/bind-android-debug.sh
+++ b/go/mobile/bind-android-debug.sh
@@ -1 +1 @@
-gomobile bind -target=android/arm,android/arm64,android/386 -o lib/Mobile.aar ./
+gomobile bind -target=android/arm,android/arm64,android/386,android/amd64 -o lib/Mobile.aar ./
diff --git a/lib/basic/Cross.dart b/lib/basic/Cross.dart
index d4733f9..1089892 100644
--- a/lib/basic/Cross.dart
+++ b/lib/basic/Cross.dart
@@ -82,23 +82,12 @@ Future<dynamic> _saveImageAndroid(String path, BuildContext context) async {
 
 /// 选择一个文件夹用于保存文件
 Future<String?> chooseFolder(BuildContext context) async {
-  if (Platform.isAndroid) {
-    if (androidVersion >= 30) {
-      if (!(await Permission.manageExternalStorage.request()).isGranted) {
-        return null;
-      }
-    } else {
-      if (!(await Permission.storage.request()).isGranted) {
-        return null;
-      }
-    }
-  }
   return FilesystemPicker.open(
     title: '选择一个文件夹',
     pickText: '将文件保存到这里',
     context: context,
     fsType: FilesystemType.folder,
-    rootDirectory: Directory(currentChooserRoot()),
+    rootDirectory: Directory(await currentChooserRoot()),
   );
 }
 
diff --git a/lib/basic/config/ChooserRoot.dart b/lib/basic/config/ChooserRoot.dart
index 6168a7a..c8c2d10 100644
--- a/lib/basic/config/ChooserRoot.dart
+++ b/lib/basic/config/ChooserRoot.dart
@@ -3,9 +3,11 @@
 import 'dart:io';
 
 import 'package:flutter/material.dart';
+import 'package:permission_handler/permission_handler.dart';
 
 import '../Common.dart';
 import '../Method.dart';
+import 'Platform.dart';
 
 const _propertyName = "chooserRoot";
 late String _chooserRoot;
@@ -14,7 +16,7 @@ Future<dynamic> initChooserRoot() async {
   _chooserRoot = await method.loadProperty(_propertyName, "");
 }
 
-String currentChooserRoot() {
+String _currentChooserRoot() {
   if (_chooserRoot == "") {
     if (Platform.isWindows) {
       return '/';
@@ -23,9 +25,6 @@ String currentChooserRoot() {
     } else if (Platform.isLinux) {
       return '/';
     } else if (Platform.isAndroid) {
-      // if (androidVersion >= 30) {
-      //   return '/storage/emulated/0/Download';
-      // }
       return '/storage/emulated/0';
     } else {
       throw 'error';
@@ -34,6 +33,21 @@ String currentChooserRoot() {
   return _chooserRoot;
 }
 
+Future<String> currentChooserRoot() async {
+  if (Platform.isAndroid) {
+    if (androidVersion >= 30) {
+      if (!(await Permission.manageExternalStorage.request()).isGranted) {
+        throw Exception("申请权限被拒绝");
+      }
+    } else {
+      if (!(await Permission.storage.request()).isGranted) {
+        throw Exception("申请权限被拒绝");
+      }
+    }
+  }
+  return _currentChooserRoot();
+}
+
 Future<dynamic> _inputChooserRoot(BuildContext context) async {
   String? input = await displayTextInputDialog(
     context,
@@ -53,7 +67,7 @@ Widget chooserRootSetting() {
     builder: (BuildContext context, void Function(void Function()) setState) {
       return ListTile(
         title: Text("文件夹选择器默认路径"),
-        subtitle: Text(currentChooserRoot()),
+        subtitle: Text(_currentChooserRoot()),
         onTap: () async {
           await _inputChooserRoot(context);
           setState(() {});
diff --git a/lib/basic/config/DownloadAndExportPath.dart b/lib/basic/config/DownloadAndExportPath.dart
index 8271354..1701f90 100644
--- a/lib/basic/config/DownloadAndExportPath.dart
+++ b/lib/basic/config/DownloadAndExportPath.dart
@@ -38,7 +38,13 @@ Widget downloadAndExportPathSetting() {
                 "您即将选择一个目录, 如果文件系统可写, 下载的同时会为您自动导出一份",
               );
               if (b) {
-                String? folder = await chooseFolder(context);
+                late String? folder;
+                try {
+                  folder = await chooseFolder(context);
+                } catch (e) {
+                  defaultToast(context, "$e");
+                  return;
+                }
                 if (folder != null) {
                   await method.saveDownloadAndExportPath(folder);
                   _downloadAndExportPath = folder;
diff --git a/lib/basic/config/Version.dart b/lib/basic/config/Version.dart
index 96f48ee..7e4f790 100644
--- a/lib/basic/config/Version.dart
+++ b/lib/basic/config/Version.dart
@@ -15,6 +15,7 @@ RegExp _versionExp = RegExp(r"^v\d+\.\d+.\d+$");
 
 late String _version;
 String? _latestVersion;
+String? _latestVersionInfo;
 
 const _propertyName = "checkVersionPeriod";
 late int _period = -1;
@@ -46,6 +47,10 @@ String? latestVersion() {
   return _latestVersion;
 }
 
+String? latestVersionInfo() {
+  return _latestVersionInfo;
+}
+
 Future autoCheckNewVersion() {
   if (_period != 0) {
     // -1 不检查, >0 未到检查时间
@@ -76,6 +81,7 @@ Future _versionCheck() async {
       String latestVersion = (json["name"]);
       if (latestVersion != _version) {
         _latestVersion = latestVersion;
+        _latestVersionInfo = json["body"] ?? "";
       }
     }
   } // else dirtyVersion
diff --git a/lib/screens/AboutScreen.dart b/lib/screens/AboutScreen.dart
index 6bf0396..a71a901 100644
--- a/lib/screens/AboutScreen.dart
+++ b/lib/screens/AboutScreen.dart
@@ -36,6 +36,7 @@ class _AboutScreenState extends State<AboutScreen> {
     var min = size.width < size.height ? size.width : size.height;
     var _currentVersion = currentVersion();
     var _latestVersion = latestVersion();
+    var _latestVersionInfo = latestVersionInfo();
     var _dirty = dirtyVersion();
     return Scaffold(
       appBar: AppBar(
@@ -80,6 +81,7 @@ class _AboutScreenState extends State<AboutScreen> {
                     Expanded(child: Container()),
                   ],
                 ),
+                _buildNewVersionInfo(_latestVersionInfo),
               ],
             ),
           ),
@@ -177,4 +179,24 @@ class _AboutScreenState extends State<AboutScreen> {
       ),
     );
   }
+
+  Widget _buildNewVersionInfo(String? latestVersionInfo) {
+    if (latestVersionInfo != null) {
+      return Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Divider(),
+          Text("更新内容:"),
+          Container(
+            padding: EdgeInsets.all(15),
+            child: Text(
+              latestVersionInfo,
+              style: TextStyle(),
+            ),
+          ),
+        ],
+      );
+    }
+    return Container();
+  }
 }
diff --git a/lib/screens/DownloadExportToFileScreen.dart b/lib/screens/DownloadExportToFileScreen.dart
index 4a9107e..e33be83 100644
--- a/lib/screens/DownloadExportToFileScreen.dart
+++ b/lib/screens/DownloadExportToFileScreen.dart
@@ -126,7 +126,13 @@ class _DownloadExportToFileScreenState
         Platform.isAndroid) {
       widgets.add(MaterialButton(
         onPressed: () async {
-          String? path = await chooseFolder(context);
+          late String? path;
+          try {
+            path = await chooseFolder(context);
+          } catch (e) {
+            defaultToast(context, "$e");
+            return;
+          }
           print("path $path");
           if (path != null) {
             try {
@@ -156,7 +162,13 @@ class _DownloadExportToFileScreenState
       widgets.add(Container(height: 10));
       widgets.add(MaterialButton(
         onPressed: () async {
-          String? path = await chooseFolder(context);
+          late String? path;
+          try {
+            path = await chooseFolder(context);
+          } catch (e) {
+            defaultToast(context, "$e");
+            return;
+          }
           print("path $path");
           if (path != null) {
             try {
diff --git a/lib/screens/DownloadImportScreen.dart b/lib/screens/DownloadImportScreen.dart
index e7235a4..a55304a 100644
--- a/lib/screens/DownloadImportScreen.dart
+++ b/lib/screens/DownloadImportScreen.dart
@@ -80,10 +80,17 @@ class _DownloadImportScreenState extends State<DownloadImportScreen> {
     return MaterialButton(
       height: 80,
       onPressed: () async {
+        late String chooseRoot;
+        try {
+          chooseRoot = await currentChooserRoot();
+        } catch (e) {
+          defaultToast(context, "$e");
+          return;
+        }
         String? path = await FilesystemPicker.open(
           title: '选择要导入的文件',
           context: context,
-          rootDirectory: Directory(currentChooserRoot()),
+          rootDirectory: Directory(chooseRoot),
           fsType: FilesystemType.file,
           folderIconColor: Colors.teal,
           allowedExtensions: ['.zip'],
@@ -117,7 +124,8 @@ class _DownloadImportScreenState extends State<DownloadImportScreen> {
     return MaterialButton(
       height: 80,
       onPressed: () async {
-        var path = await inputString(context, '请输入导出设备提供的地址\n例如 "192.168.1.2:50000"');
+        var path =
+            await inputString(context, '请输入导出设备提供的地址\n例如 "192.168.1.2:50000"');
         if (path != null) {
           try {
             setState(() {