diff --git a/addons/EGFramework/Module/SaveTools/File/EGLocalFileSave.cs b/addons/EGFramework/Module/SaveTools/File/EGLocalFileSave.cs
index 5ad0ea5..db35faf 100644
--- a/addons/EGFramework/Module/SaveTools/File/EGLocalFileSave.cs
+++ b/addons/EGFramework/Module/SaveTools/File/EGLocalFileSave.cs
@@ -1,77 +1,173 @@
 using System.Collections.Generic;
 using System.IO;
+using System.Runtime.InteropServices;
 
 namespace EGFramework{
+    /// <summary>
+    /// This class is used to save files locally. such as u disk or other local path. used for backup or other purpose.
+    /// </summary>
     public class EGLocalFileSave : IEGSave, IEGSaveFile
     {
+        public string RootPath { get; set; } 
+
         public void InitSave(string path)
         {
-            throw new System.NotImplementedException();
+            this.RootPath = path;    
         }
 
         public void CopyFile(string sourcePath, string copyPath)
         {
-            throw new System.NotImplementedException();
+            if(IsRemoteFileExist(sourcePath)){
+                string sourceCombinedPath = Path.Combine(RootPath, sourcePath);
+                string copyCombinedPath = Path.Combine(RootPath, copyPath);
+                File.Copy(sourceCombinedPath,copyCombinedPath,true);
+            }else{
+                throw new FileNotFoundException("File not exist!");
+            }
         }
 
         public void DownloadFile(string remotePath, string localPath)
         {
-            throw new System.NotImplementedException();
+            if(IsRemoteFileExist(remotePath)){
+                string combinedPath = Path.Combine(RootPath, remotePath);
+                File.Copy(combinedPath,localPath,true);
+            }else{
+                throw new FileNotFoundException("File not exist!");
+            }
         }
 
         public Stream DownloadFile(string remotePath)
         {
-            throw new System.NotImplementedException();
+            if(IsRemoteFileExist(remotePath)){
+                string combinedPath = Path.Combine(RootPath, remotePath);
+                FileStream fileStream = new FileStream(combinedPath,FileMode.Open,FileAccess.Read);
+                return fileStream;
+            }else{
+                throw new FileNotFoundException("File not exist!");
+            }
         }
 
         public bool IsRemoteDirectoryExist(string remotePath)
         {
-            throw new System.NotImplementedException();
+            string combinedPath = Path.Combine(RootPath, remotePath);
+            return Directory.Exists(combinedPath);
         }
 
         public bool IsRemoteFileExist(string remotePath)
         {
-            throw new System.NotImplementedException();
+            string combinedPath = Path.Combine(RootPath, remotePath);
+            return File.Exists(combinedPath);
         }
 
         public IEnumerable<IEGFileMsg> ListLocalFilePath(string localPath)
         {
-            throw new System.NotImplementedException();
+            string [] filePaths = Directory.GetFiles(localPath);
+            string [] directoryPaths = Directory.GetDirectories(localPath);
+            List<IEGFileMsg> fileMsgs = new List<IEGFileMsg>();
+            foreach(string filePath in filePaths){
+                FileInfo fileInfo = new FileInfo(filePath);
+                EGFileMsg msg = new EGFileMsg();
+                msg.Init(fileInfo.Name,false,filePath,fileInfo.Length,fileInfo.LastWriteTime);
+                fileMsgs.Add(msg);
+            }
+            foreach(string directoryPath in directoryPaths){
+                DirectoryInfo directoryInfo = new DirectoryInfo(directoryPath);
+                EGFileMsg msg = new EGFileMsg();
+                msg.Init(directoryInfo.Name,true,directoryPath,null,directoryInfo.LastWriteTime);
+                fileMsgs.Add(msg);
+            }
+            return fileMsgs;
         }
 
         public IEnumerable<IEGFileMsg> ListRemoteFilePath(string remotePath)
         {
-            throw new System.NotImplementedException();
+            string combinedPath = Path.Combine(RootPath, remotePath);
+            string [] filePaths = Directory.GetFiles(combinedPath);
+            string [] directoryPaths = Directory.GetDirectories(combinedPath);
+            List<IEGFileMsg> fileMsgs = new List<IEGFileMsg>();
+            foreach(string filePath in filePaths){
+                FileInfo fileInfo = new FileInfo(filePath);
+                EGFileMsg msg = new EGFileMsg();
+                msg.Init(fileInfo.Name,false,filePath,fileInfo.Length,fileInfo.LastWriteTime);
+                fileMsgs.Add(msg);
+            }
+            foreach(string directoryPath in directoryPaths){
+                DirectoryInfo directoryInfo = new DirectoryInfo(directoryPath);
+                EGFileMsg msg = new EGFileMsg();
+                msg.Init(directoryInfo.Name,true,directoryPath,null,directoryInfo.LastWriteTime);
+                fileMsgs.Add(msg);
+            }
+            return fileMsgs;
         }
 
         public void MakeDirectory(string remotePath)
         {
-            throw new System.NotImplementedException();
+            string combinedPath = Path.Combine(RootPath, remotePath);
+            if(Directory.Exists(combinedPath) == false){
+                Directory.CreateDirectory(combinedPath);
+            }
         }
 
         public void MoveFile(string sourcePath, string movePath)
         {
-            throw new System.NotImplementedException();
+            if(IsRemoteFileExist(sourcePath)){
+                string sourceCombinedPath = Path.Combine(RootPath, sourcePath);
+                string moveCombinedPath = Path.Combine(RootPath, movePath);
+                File.Move(sourceCombinedPath,moveCombinedPath);
+            }else{
+                throw new FileNotFoundException("File not exist!");
+            }
         }
 
         public void RemoveFile(string remotePath)
         {
-            throw new System.NotImplementedException();
+            if(IsRemoteFileExist(remotePath)){
+                string combinedPath = Path.Combine(RootPath, remotePath);
+                File.Delete(combinedPath);
+            }else{
+                throw new FileNotFoundException("File not exist!");
+            }
         }
 
         public void SyncFile(string remotePath, string localPath)
         {
-            throw new System.NotImplementedException();
+            FileInfo fileInfo = new FileInfo(localPath);
+            if(fileInfo.Exists == false){
+                throw new FileNotFoundException("Local File not exist!");
+            }
+            FileInfo remoteFileInfo = new FileInfo(remotePath);
+            if(remoteFileInfo.Exists == false){
+                throw new FileNotFoundException("Remote File not exist!");
+            }
+            if(fileInfo.LastWriteTime > remoteFileInfo.LastWriteTime){
+                string combinedPath = Path.Combine(RootPath, remotePath);
+                File.Copy(localPath,combinedPath,true);
+            }else if(fileInfo.LastWriteTime < remoteFileInfo.LastWriteTime){
+                string combinedPath = Path.Combine(RootPath, remotePath);
+                File.Copy(combinedPath,localPath,true);
+            }else{
+                EG.Print("File is same, no need to sync!");
+            }
         }
 
         public void UploadFile(FileStream localFileStream, string remotePath)
         {
-            throw new System.NotImplementedException();
+            string combinedPath = Path.Combine(RootPath, remotePath);
+            FileStream fileStream = new FileStream(combinedPath,FileMode.Create,FileAccess.Write);
+            localFileStream.CopyTo(fileStream);
+            fileStream.Close();
+            localFileStream.Close();
+            fileStream.Dispose();
         }
 
         public void UploadFile(string localPath, string remotePath)
         {
-            throw new System.NotImplementedException();
+            if(File.Exists(localPath)){
+                string combinedPath = Path.Combine(RootPath, remotePath);
+                File.Copy(localPath,combinedPath,true);
+            }else{
+                throw new FileNotFoundException("File not exist!");
+            }
         }
     }
 }
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