diff --git a/lib/data/model/app/path_with_prefix.dart b/lib/data/model/app/path_with_prefix.dart
index 77b74541e..bc25e99fe 100644
--- a/lib/data/model/app/path_with_prefix.dart
+++ b/lib/data/model/app/path_with_prefix.dart
@@ -1,10 +1,12 @@
 import 'package:fl_lib/fl_lib.dart';
 
+final _seperator = Pfs.seperator;
+
 /// It's used on platform's file system.
 /// So use [Platform.pathSeparator] to join path.
 class LocalPath {
   final String _prefixPath;
-  String _path = '/';
+  String _path = _seperator;
   String? _prePath;
   String get path => _prefixPath + _path;
 
@@ -13,20 +15,20 @@ class LocalPath {
   void update(String newPath) {
     _prePath = _path;
     if (newPath == '..') {
-      _path = _path.substring(0, _path.lastIndexOf('/'));
+      _path = _path.substring(0, _path.lastIndexOf(_seperator));
       if (_path == '') {
-        _path = '/';
+        _path = _seperator;
       }
       return;
     }
-    if (newPath == '/') {
-      _path = '/';
+    if (newPath == _seperator) {
+      _path = _seperator;
       return;
     }
     _path = _path.joinPath(newPath);
   }
 
-  bool get canBack => path != '$_prefixPath/';
+  bool get canBack => path != '$_prefixPath$_seperator';
 
   bool undo() {
     if (_prePath == null || _path == _prePath) {
@@ -38,7 +40,7 @@ class LocalPath {
 }
 
 String _trimSuffix(String prefixPath) {
-  if (prefixPath.endsWith('/')) {
+  if (prefixPath.endsWith(_seperator)) {
     return prefixPath.substring(0, prefixPath.length - 1);
   }
   return prefixPath;