diff --git a/TagsTree/Views/FilePropertiesPage.xaml.cs b/TagsTree/Views/FilePropertiesPage.xaml.cs
index 6c65d2c..47fbe89 100644
--- a/TagsTree/Views/FilePropertiesPage.xaml.cs
+++ b/TagsTree/Views/FilePropertiesPage.xaml.cs
@@ -6,10 +6,10 @@
 using Microsoft.UI.Xaml.Input;
 using Microsoft.UI.Xaml.Media.Animation;
 using Microsoft.UI.Xaml.Navigation;
-using Microsoft.VisualBasic.FileIO;
 using TagsTree.Services;
 using TagsTree.Services.ExtensionMethods;
 using TagsTree.ViewModels;
+using System.IO;
 
 namespace TagsTree.Views;
 
@@ -45,7 +45,7 @@ private async void RenameBClick(object sender, RoutedEventArgs e)
             }
 
             var newFullName = FileViewModel.Path + @"\" + cd.Text;
-            if (FileViewModel.IsFolder ? FileSystem.DirectoryExists(newFullName) : FileSystem.FileExists(newFullName))
+            if (FileViewModel.IsFolder ? Directory.Exists(newFullName) : File.Exists(newFullName))
             {
                 var isFolder = FileViewModel.IsFolder ? "夹" : "";
                 return $"新文件{isFolder}名与目录中其他文件{isFolder}同名！";
@@ -58,6 +58,7 @@ private async void RenameBClick(object sender, RoutedEventArgs e)
         var newFullName = FileViewModel.Path + @"\" + InputName.Text;
         FileViewModel.FileModel.Rename(newFullName);
         FileViewModel.MoveOrRenameAndSave(newFullName);
+        // 相当于对FileViewModel的所有属性OnPropertyChanged
         OnPropertyChanged(nameof(FileViewModel));
     }
     private async void MoveBClick(object sender, RoutedEventArgs e)
diff --git a/TagsTree/Views/SettingsPage.xaml b/TagsTree/Views/SettingsPage.xaml
index 863f8a7..300f90d 100644
--- a/TagsTree/Views/SettingsPage.xaml
+++ b/TagsTree/Views/SettingsPage.xaml
@@ -7,19 +7,18 @@
     xmlns:local="using:TagsTree.Views"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
     xmlns:root="using:TagsTree"
-    xmlns:ui="using:CommunityToolkit.WinUI.UI.Controls"
     Background="Transparent"
     NavigationCacheMode="Required"
     mc:Ignorable="d">
     <ScrollViewer>
-        <StackPanel Margin="40,30">
+        <StackPanel>
             <labs:SettingsExpander Description="应用的主题色" Header="主题">
                 <labs:SettingsExpander.HeaderIcon>
                     <FontIcon Glyph="&#xE771;" />
                 </labs:SettingsExpander.HeaderIcon>
                 <labs:SettingsExpander.Items>
                     <labs:SettingsCard HorizontalContentAlignment="Left" ContentAlignment="Vertical">
-                        <RadioButtons x:Name="RbTheme">
+                        <RadioButtons SelectedIndex="{x:Bind root:App.AppConfiguration.Theme}">
                             <RadioButton Checked="OnThemeRadioButtonChecked" Content="跟随系统">
                                 <RadioButton.Tag>
                                     <x:Int32>0</x:Int32>
@@ -49,7 +48,7 @@
                         IsClickEnabled="True"
                         Tapped="BLibraryPath_Click">
                         <labs:SettingsCard.Description>
-                            <TextBox x:Name="TbLibraryPath" />
+                            <TextBox x:Name="TbLibraryPath" KeyUp="TbLibraryPath_OnCharacterReceived" />
                         </labs:SettingsCard.Description>
                     </labs:SettingsCard>
                 </labs:SettingsExpander.Items>
@@ -58,13 +57,13 @@
                 Description="将所在路径文件夹名作为标签使用"
                 Header="文件夹标签"
                 HeaderIcon="Tag">
-                <ToggleSwitch x:Name="CbRootFoldersExist" />
+                <ToggleSwitch IsOn="{x:Bind root:App.AppConfiguration.PathTagsEnabled}" Toggled="PathTagsEnabled_OnToggled" />
             </labs:SettingsCard>
             <labs:SettingsCard
                 Description="监控文件路径文件下文件（夹）的变化"
                 Header="监控文件"
                 HeaderIcon="View">
-                <ToggleSwitch x:Name="TsFilesObserver" />
+                <ToggleSwitch IsOn="{x:Bind root:App.AppConfiguration.FilesObserverEnabled}" Toggled="FilesObserver_OnToggled" />
             </labs:SettingsCard>
             <labs:SettingsExpander
                 Description="指定文件和标签记录所在的文件夹并进行导入导出的操作"
@@ -103,13 +102,6 @@
                     </labs:SettingsCard>
                 </labs:SettingsExpander.Items>
             </labs:SettingsExpander>
-            <ui:DockPanel>
-                <Button
-                    ui:DockPanel.Dock="Left"
-                    Content="保存"
-                    Tapped="BSave_Click" />
-                <InfoBar x:Name="InfoBar" />
-            </ui:DockPanel>
         </StackPanel>
     </ScrollViewer>
 </Page>
diff --git a/TagsTree/Views/SettingsPage.xaml.cs b/TagsTree/Views/SettingsPage.xaml.cs
index 8891550..bbe5440 100644
--- a/TagsTree/Views/SettingsPage.xaml.cs
+++ b/TagsTree/Views/SettingsPage.xaml.cs
@@ -1,7 +1,10 @@
-using Microsoft.UI;
+using System.IO;
+using Microsoft.UI;
 using Microsoft.UI.Xaml;
 using Microsoft.UI.Xaml.Controls;
-using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using Windows.System;
+using Microsoft.UI.Xaml.Input;
 using TagsTree.Services;
 using TagsTree.Services.ExtensionMethods;
 
@@ -9,14 +12,7 @@ namespace TagsTree.Views;
 
 public partial class SettingsPage : Page
 {
-    public SettingsPage()
-    {
-        InitializeComponent();
-        TbLibraryPath.Text = App.AppConfiguration.LibraryPath;
-        RbTheme.SelectedIndex = App.AppConfiguration.Theme;
-        TsFilesObserver.IsOn = App.AppConfiguration.FilesObserverEnabled;
-        CbRootFoldersExist.IsOn = App.AppConfiguration.PathTagsEnabled;
-    }
+    public SettingsPage() => InitializeComponent();
 
     private void OnThemeRadioButtonChecked(object sender, RoutedEventArgs e)
     {
@@ -27,6 +23,7 @@ private void OnThemeRadioButtonChecked(object sender, RoutedEventArgs e)
             _ => ElementTheme.Default
         };
 
+        // 内含 App.AppConfiguration.Theme = selectedTheme;
         ThemeHelper.RootTheme = selectedTheme;
         Application.Current.Resources["WindowCaptionForeground"] = selectedTheme switch
         {
@@ -36,10 +33,14 @@ private void OnThemeRadioButtonChecked(object sender, RoutedEventArgs e)
         };
 
         TitleBarHelper.TriggerTitleBarRepaint();
+        AppContext.SaveConfiguration(App.AppConfiguration);
     }
 
     private async void BLibraryPath_Click(object sender, RoutedEventArgs e)
-        => TbLibraryPath.Text = (await FileSystemHelper.GetStorageFolder())?.Path ?? TbLibraryPath.Text;
+    {
+        TbLibraryPath.Text = (await FileSystemHelper.GetStorageFolder())?.Path ?? TbLibraryPath.Text;
+        await ValidLibraryPathSet(TbLibraryPath.Text);
+    }
 
     private async void BExport_Click(object sender, RoutedEventArgs e)
     {
@@ -52,35 +53,44 @@ private async void BImport_Click(object sender, RoutedEventArgs e)
         if (await FileSystemHelper.GetStorageFolder() is { } folder)
             folder.Path.Copy(AppContext.AppLocalFolder);
     }
+
     private void BOpenDirectory_Click(object sender, RoutedEventArgs e) => AppContext.AppLocalFolder.Open();
 
-    private async void BSave_Click(object sender, RoutedEventArgs e)
+    private void FilesObserver_OnToggled(object sender, RoutedEventArgs e)
+    {
+        App.AppConfiguration.FilesObserverEnabled = ((ToggleSwitch)sender).IsOn;
+        AppContext.SaveConfiguration(App.AppConfiguration);
+    }
+
+    private void PathTagsEnabled_OnToggled(object sender, RoutedEventArgs e)
     {
-        var legalPath = new Regex($@"^[a-zA-Z]:\\[^{FileSystemHelper.GetInvalidPathChars}]*$");
-        if (!legalPath.IsMatch(TbLibraryPath.Text))
+        App.AppConfiguration.PathTagsEnabled = ((ToggleSwitch)sender).IsOn;
+        AppContext.SaveConfiguration(App.AppConfiguration);
+    }
+
+    private async void TbLibraryPath_OnCharacterReceived(object sender, KeyRoutedEventArgs e)
+    {
+        if (e.Key is not VirtualKey.Enter) 
+            return;
+        if (Directory.Exists(((TextBox)sender).Text))
         {
-            InfoBar.Severity = InfoBarSeverity.Error;
-            InfoBar.Message = "错误";
-            InfoBar.Message = "路径错误！请填写正确完整的文件夹路径！";
+            await ValidLibraryPathSet(((TextBox)sender).Text);
+            ((TextBox)sender).Description = "";
         }
         else
+            ((TextBox)sender).Description = "路径错误！请填写正确、完整、存在的文件夹路径！";
+    }
+
+    private static async Task ValidLibraryPathSet(string path)
+    {
+        App.AppConfiguration.LibraryPath = path;
+        AppContext.SaveConfiguration(App.AppConfiguration);
+        if (!App.ConfigSet)
         {
-            App.AppConfiguration.LibraryPath = TbLibraryPath.Text;
-            App.AppConfiguration.PathTagsEnabled = CbRootFoldersExist.IsOn;
-            App.AppConfiguration.FilesObserverEnabled = TsFilesObserver.IsOn;
-            AppContext.SaveConfiguration(App.AppConfiguration);
-            InfoBar.Severity = InfoBarSeverity.Success;
-            InfoBar.Title = "成功";
-            InfoBar.Message = "已保存";
-            if (!App.ConfigSet)
-            {
-                App.ConfigSet = true;
-                await WindowHelper.Window.ConfigIsSet();
-            }
-            else
-                ((NavigationViewItem)App.RootNavigationView.FooterMenuItems[0]).IsEnabled = await App.ChangeFilesObserver();
+            App.ConfigSet = true;
+            await WindowHelper.Window.ConfigIsSet();
         }
-
-        InfoBar.IsOpen = true;
+        else
+            ((NavigationViewItem)App.RootNavigationView.FooterMenuItems[0]).IsEnabled = await App.ChangeFilesObserver();
     }
 }