diff --git a/ZR.Admin.Grpc/Protos/FileTransfer.proto b/ZR.Admin.Grpc/Protos/FileTransfer.proto
new file mode 100644
index 0000000..fa4306d
--- /dev/null
+++ b/ZR.Admin.Grpc/Protos/FileTransfer.proto
@@ -0,0 +1,54 @@
+syntax = "proto3";
+
+option csharp_namespace = "ZR.Admin.Grpc";
+
+package filetransfer;
+
+service FileTransfer {
+  rpc InitUpload (InitUploadRequest) returns (InitUploadResponse);
+  rpc UploadChunk (stream UploadChunkRequest) returns (UploadChunkResponse);
+  rpc CompleteUpload (CompleteUploadRequest) returns (CompleteUploadResponse);
+  rpc CheckUploadStatus (CheckUploadStatusRequest) returns (CheckUploadStatusResponse);
+}
+
+message InitUploadRequest {
+  string file_name = 1;
+  int64 file_size = 2;
+  string file_hash = 3;
+}
+
+message InitUploadResponse {
+  string session_id = 1;
+  int64 uploaded_bytes = 2;
+}
+
+message UploadChunkRequest {
+  string session_id = 1;
+  bytes chunk_data = 2;
+  int64 offset = 3;
+}
+
+message UploadChunkResponse {
+  int64 uploaded_bytes = 1;
+}
+
+message CompleteUploadRequest {
+  string session_id = 1;
+  string file_hash = 2;
+}
+
+message CompleteUploadResponse {
+  bool success = 1;
+  string message = 2;
+}
+
+message CheckUploadStatusRequest {
+  string file_name = 1;
+  string file_hash = 2;
+}
+
+message CheckUploadStatusResponse {
+  string session_id = 1;
+  int64 uploaded_bytes = 2;
+  bool exists = 3;
+}
\ No newline at end of file
diff --git a/ZR.Admin.Grpc/Services/FileTransferService.cs b/ZR.Admin.Grpc/Services/FileTransferService.cs
new file mode 100644
index 0000000..e5cfaf1
--- /dev/null
+++ b/ZR.Admin.Grpc/Services/FileTransferService.cs
@@ -0,0 +1,109 @@
+using Grpc.Core;
+using ZR.Admin.Grpc;
+
+namespace GrpcService.Services
+{
+    public class FileTransferService : FileTransfer.FileTransferBase
+    {
+        private readonly string _storagePath = "Îļþ";
+        private readonly IUploadSessionManager _sessionManager;
+
+        public FileTransferService(IUploadSessionManager sessionManager)
+        {
+            Directory.CreateDirectory(_storagePath);
+            _sessionManager = sessionManager;
+        }
+
+        public override Task<InitUploadResponse> InitUpload(InitUploadRequest request, ServerCallContext context)
+        {
+            var sessionId = _sessionManager.CreateSession(request.FileName, request.FileSize, request.FileHash);
+            var uploadedBytes = _sessionManager.GetUploadedBytes(sessionId);
+
+            return Task.FromResult(new InitUploadResponse
+            {
+                SessionId = sessionId,
+                UploadedBytes = uploadedBytes
+            });
+        }
+
+        public override async Task<UploadChunkResponse> UploadChunk(IAsyncStreamReader<UploadChunkRequest> requestStream, ServerCallContext context)
+        {
+            UploadChunkRequest currentRequest = null;
+            var response = new UploadChunkResponse();
+
+            while (await requestStream.MoveNext())
+            {
+                currentRequest = requestStream.Current;
+                var session = _sessionManager.GetSession(currentRequest.SessionId);
+
+                if (session == null)
+                {
+                    throw new RpcException(new Status(StatusCode.NotFound, "Session not found"));
+                }
+
+                using (var fileStream = new FileStream(session.TempFilePath, FileMode.OpenOrCreate, FileAccess.Write))
+                {
+                    fileStream.Seek(currentRequest.Offset, SeekOrigin.Begin);
+                    await fileStream.WriteAsync(currentRequest.ChunkData.ToByteArray(), 0, currentRequest.ChunkData.Length);
+                }
+
+                _sessionManager.UpdateSessionProgress(currentRequest.SessionId, currentRequest.Offset + currentRequest.ChunkData.Length);
+                response.UploadedBytes = currentRequest.Offset + currentRequest.ChunkData.Length;
+            }
+
+            return response;
+        }
+
+        public override async Task<CompleteUploadResponse> CompleteUpload(CompleteUploadRequest request, ServerCallContext context)
+        {
+            var session = _sessionManager.GetSession(request.SessionId);
+            if (session == null)
+            {
+                return await Task.FromResult(new CompleteUploadResponse
+                {
+                    Success = false,
+                    Message = "Session not found"
+                });
+            }
+
+            // Verify file hash if needed
+            if (!string.IsNullOrEmpty(request.FileHash))
+            {
+                var actualHash = await FileHelper.GetQuickFileIdentity(session.TempFilePath);
+                if (actualHash != request.FileHash)
+                {
+                    return await Task.FromResult(new CompleteUploadResponse
+                    {
+                        Success = false,
+                        Message = "File hash mismatch"
+                    });
+                }
+            }
+
+            // Move temp file to final location
+            var finalPath = Path.Combine(_storagePath, session.FileName);
+            //var finalPath = FileHelper.GetUniqueFilePath(_storagePath, session.FileName);
+            File.Move(session.TempFilePath, finalPath, true);
+
+            _sessionManager.CompleteSession(request.SessionId);
+
+            return await Task.FromResult(new CompleteUploadResponse
+            {
+                Success = true,
+                Message = "File uploaded successfully"
+            });
+        }
+
+        public override Task<CheckUploadStatusResponse> CheckUploadStatus(CheckUploadStatusRequest request, ServerCallContext context)
+        {
+            var session = _sessionManager.FindSession(request.FileName, request.FileHash);
+
+            return Task.FromResult(new CheckUploadStatusResponse
+            {
+                SessionId = session?.SessionId ?? "",
+                UploadedBytes = session?.UploadedBytes ?? 0,
+                Exists = session != null
+            });
+        }
+    }
+}
\ No newline at end of file
diff --git a/ZR.Admin.Grpc/ZR.Admin.Grpc.csproj b/ZR.Admin.Grpc/ZR.Admin.Grpc.csproj
index 27c5eef..cdb498a 100644
--- a/ZR.Admin.Grpc/ZR.Admin.Grpc.csproj
+++ b/ZR.Admin.Grpc/ZR.Admin.Grpc.csproj
@@ -6,10 +6,15 @@
         <ImplicitUsings>enable</ImplicitUsings>
     </PropertyGroup>
 
+    <ItemGroup>
+      <Compile Remove="Services\FileTransferService.cs" />
+    </ItemGroup>
+
     <ItemGroup>
         <Protobuf Include="Protos\greet.proto" GrpcServices="Both" />
         <Protobuf Include="Protos\block.proto" GrpcServices="Client" />
         <Protobuf Include="Protos\my_diary.proto" GrpcServices="Server" />
+        <Protobuf Include="Protos\FileTransfer.proto" GrpcServices="Server" />
     </ItemGroup>
 
     <ItemGroup>