diff --git a/assets b/assets
index f47af47..a1028e7 160000
--- a/assets
+++ b/assets
@@ -1 +1 @@
-Subproject commit f47af47efeecae015dd28a76ab797665391029e0
+Subproject commit a1028e7e0ae96be4bb67d8c117cf39e07c207473
diff --git a/pkg/filesystem/errors.go b/pkg/filesystem/errors.go
index 63d1961..6ca9e3a 100644
--- a/pkg/filesystem/errors.go
+++ b/pkg/filesystem/errors.go
@@ -7,20 +7,19 @@ import (
 )
 
 var (
-	ErrUnknownPolicyType        = errors.New("未知存储策略类型")
-	ErrFileSizeTooBig           = errors.New("单个文件尺寸太大")
-	ErrFileExtensionNotAllowed  = errors.New("不允许上传此类型的文件")
-	ErrInsufficientCapacity     = errors.New("容量空间不足")
-	ErrIllegalObjectName        = errors.New("目标名称非法")
-	ErrClientCanceled           = errors.New("客户端取消操作")
-	ErrRootProtected            = errors.New("无法对根目录进行操作")
-	ErrInsertFileRecord         = serializer.NewError(serializer.CodeDBError, "无法插入文件记录", nil)
-	ErrFileExisted              = serializer.NewError(serializer.CodeObjectExist, "同名文件或目录已存在", nil)
-	ErrFileUploadSessionExisted = serializer.NewError(serializer.CodeObjectExist, "当前目录下已经有同名文件正在上传中，请尝试清空上传会话", nil)
-	ErrFolderExisted            = serializer.NewError(serializer.CodeObjectExist, "同名目录已存在", nil)
-	ErrPathNotExist             = serializer.NewError(404, "路径不存在", nil)
-	ErrObjectNotExist           = serializer.NewError(404, "文件不存在", nil)
-	ErrIO                       = serializer.NewError(serializer.CodeIOFailed, "无法读取文件数据", nil)
-	ErrDBListObjects            = serializer.NewError(serializer.CodeDBError, "无法列取对象记录", nil)
-	ErrDBDeleteObjects          = serializer.NewError(serializer.CodeDBError, "无法删除对象记录", nil)
+	ErrUnknownPolicyType        = serializer.NewError(serializer.CodeInternalSetting, "Unknown policy type", nil)
+	ErrFileSizeTooBig           = serializer.NewError(serializer.CodeFileTooLarge, "", nil)
+	ErrFileExtensionNotAllowed  = serializer.NewError(serializer.CodeFileTypeNotAllowed, "", nil)
+	ErrInsufficientCapacity     = serializer.NewError(serializer.CodeInsufficientCapacity, "", nil)
+	ErrIllegalObjectName        = serializer.NewError(serializer.CodeIllegalObjectName, "", nil)
+	ErrClientCanceled           = errors.New("Client canceled operation")
+	ErrRootProtected            = serializer.NewError(serializer.CodeRootProtected, "", nil)
+	ErrInsertFileRecord         = serializer.NewError(serializer.CodeDBError, "Failed to create file record", nil)
+	ErrFileExisted              = serializer.NewError(serializer.CodeObjectExist, "", nil)
+	ErrFileUploadSessionExisted = serializer.NewError(serializer.CodeConflictUploadOngoing, "", nil)
+	ErrPathNotExist             = serializer.NewError(serializer.CodeParentNotExist, "", nil)
+	ErrObjectNotExist           = serializer.NewError(serializer.CodeParentNotExist, "", nil)
+	ErrIO                       = serializer.NewError(serializer.CodeIOFailed, "Failed to read file data", nil)
+	ErrDBListObjects            = serializer.NewError(serializer.CodeDBError, "Failed to list object records", nil)
+	ErrDBDeleteObjects          = serializer.NewError(serializer.CodeDBError, "Failed to delete object records", nil)
 )
diff --git a/pkg/serializer/error.go b/pkg/serializer/error.go
index 2b31aa2..19f520c 100644
--- a/pkg/serializer/error.go
+++ b/pkg/serializer/error.go
@@ -142,6 +142,24 @@ const (
 	CodeListFilesError = 40045
 	// 对系统节点进行非法操作
 	CodeInvalidActionOnSystemNode = 40046
+	// 创建文件系统出错
+	CodeCreateFSError = 40047
+	// 创建任务出错
+	CodeCreateTaskError = 40048
+	// 文件尺寸太大
+	CodeFileTooLarge = 40049
+	// 文件类型不允许
+	CodeFileTypeNotAllowed = 40050
+	// 用户容量不足
+	CodeInsufficientCapacity = 40051
+	// 对象名非法
+	CodeIllegalObjectName = 40052
+	// 不支持对根目录执行此操作
+	CodeRootProtected = 40053
+	// 当前目录下已经有同名文件正在上传中
+	CodeConflictUploadOngoing = 40054
+	// 文件信息不一致
+	CodeMetaMismatch = 40055
 	// CodeDBError 数据库操作失败
 	CodeDBError = 50001
 	// CodeEncryptError 加密失败
@@ -158,6 +176,10 @@ const (
 	CodeUpdateSetting = 50008
 	// 跨域策略添加失败
 	CodeAddCORS = 50009
+	// 节点不可用
+	CodeNodeOffline = 50010
+	// 文件元信息查询失败
+	CodeQueryMetaFailed = 50011
 	//CodeParamErr 各种奇奇怪怪的参数错误
 	CodeParamErr = 40001
 	// CodeNotSet 未定错误，后续尝试从error中获取
@@ -183,7 +205,8 @@ func ParamErr(msg string, err error) Response {
 // Err 通用错误处理
 func Err(errCode int, msg string, err error) Response {
 	// 底层错误是AppError，则尝试从AppError中获取详细信息
-	if appError, ok := err.(AppError); ok {
+	var appError AppError
+	if errors.As(err, &appError) {
 		errCode = appError.Code
 		err = appError.RawError
 		msg = appError.Msg
diff --git a/routers/controllers/callback.go b/routers/controllers/callback.go
index dade566..ba3ab46 100644
--- a/routers/controllers/callback.go
+++ b/routers/controllers/callback.go
@@ -57,7 +57,7 @@ func UpyunCallback(c *gin.Context) {
 	if err := c.ShouldBind(&callbackBody); err == nil {
 		if callbackBody.Code != 200 {
 			util.Log().Debug(
-				"又拍云回调返回错误代码%d，信息：%s",
+				"Upload callback returned error code:%d, message: %s",
 				callbackBody.Code,
 				callbackBody.Message,
 			)
diff --git a/service/admin/file.go b/service/admin/file.go
index 8c6c6e9..1d7bc2b 100644
--- a/service/admin/file.go
+++ b/service/admin/file.go
@@ -42,7 +42,7 @@ func (service *ListFolderService) List(c *gin.Context) serializer.Response {
 		// 创建文件系统
 		fs, err := filesystem.NewAnonymousFileSystem()
 		if err != nil {
-			return serializer.Err(serializer.CodeInternalSetting, "Failed to create filesystem.", err)
+			return serializer.Err(serializer.CodeCreateFSError, "", err)
 		}
 		defer fs.Recycle()
 
@@ -69,7 +69,7 @@ func (service *ListFolderService) List(c *gin.Context) serializer.Response {
 	// 创建文件系统
 	fs, err := filesystem.NewFileSystem(&user)
 	if err != nil {
-		return serializer.Err(serializer.CodeInternalSetting, "Failed to create filesystem.", err)
+		return serializer.Err(serializer.CodeCreateFSError, "", err)
 	}
 	defer fs.Recycle()
 
diff --git a/service/aria2/add.go b/service/aria2/add.go
index 6b86069..52b5964 100644
--- a/service/aria2/add.go
+++ b/service/aria2/add.go
@@ -24,24 +24,24 @@ func (service *BatchAddURLService) Add(c *gin.Context, taskType int) serializer.
 	// 创建文件系统
 	fs, err := filesystem.NewFileSystemFromContext(c)
 	if err != nil {
-		return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
+		return serializer.Err(serializer.CodeCreateFSError, "", err)
 	}
 	defer fs.Recycle()
 
 	// 检查用户组权限
 	if !fs.User.Group.OptionsSerialized.Aria2 {
-		return serializer.Err(serializer.CodeGroupNotAllowed, "当前用户组无法进行此操作", nil)
+		return serializer.Err(serializer.CodeGroupNotAllowed, "", nil)
 	}
 
 	// 存放目录是否存在
 	if exist, _ := fs.IsPathExist(service.Dst); !exist {
-		return serializer.Err(serializer.CodeNotFound, "存放路径不存在", nil)
+		return serializer.Err(serializer.CodeParentNotExist, "", nil)
 	}
 
 	// 检查批量任务数量
 	limit := fs.User.Group.OptionsSerialized.Aria2BatchSize
 	if limit > 0 && len(service.URLs) > limit {
-		return serializer.Err(serializer.CodeBatchAria2Size, "Exceed aria2 batch size", nil)
+		return serializer.Err(serializer.CodeBatchAria2Size, "", nil)
 	}
 
 	res := make([]serializer.Response, 0, len(service.URLs))
@@ -71,25 +71,25 @@ func (service *AddURLService) Add(c *gin.Context, fs *filesystem.FileSystem, tas
 		// 创建文件系统
 		fs, err = filesystem.NewFileSystemFromContext(c)
 		if err != nil {
-			return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
+			return serializer.Err(serializer.CodeCreateFSError, "", err)
 		}
 		defer fs.Recycle()
 
 		// 检查用户组权限
 		if !fs.User.Group.OptionsSerialized.Aria2 {
-			return serializer.Err(serializer.CodeGroupNotAllowed, "当前用户组无法进行此操作", nil)
+			return serializer.Err(serializer.CodeGroupNotAllowed, "", nil)
 		}
 
 		// 存放目录是否存在
 		if exist, _ := fs.IsPathExist(service.Dst); !exist {
-			return serializer.Err(serializer.CodeNotFound, "存放路径不存在", nil)
+			return serializer.Err(serializer.CodeParentNotExist, "", nil)
 		}
 	}
 
 	downloads := model.GetDownloadsByStatusAndUser(0, fs.User.ID, common.Downloading, common.Paused, common.Ready)
 	limit := fs.User.Group.OptionsSerialized.Aria2BatchSize
 	if limit > 0 && len(downloads)+1 > limit {
-		return serializer.Err(serializer.CodeBatchAria2Size, "Exceed aria2 batch size", nil)
+		return serializer.Err(serializer.CodeBatchAria2Size, "", nil)
 	}
 
 	// 创建任务
@@ -107,20 +107,20 @@ func (service *AddURLService) Add(c *gin.Context, fs *filesystem.FileSystem, tas
 	// 获取 Aria2 实例
 	err, node := cluster.Default.BalanceNodeByFeature("aria2", lb)
 	if err != nil {
-		return serializer.Err(serializer.CodeInternalSetting, "Aria2 实例获取失败", err)
+		return serializer.Err(serializer.CodeInternalSetting, "Failed to get Aria2 instance", err)
 	}
 
 	// 创建任务
 	gid, err := node.GetAria2Instance().CreateTask(task, fs.User.Group.OptionsSerialized.Aria2Options)
 	if err != nil {
-		return serializer.Err(serializer.CodeNotSet, "任务创建失败", err)
+		return serializer.Err(serializer.CodeCreateTaskError, "", err)
 	}
 
 	task.GID = gid
 	task.NodeID = node.ID()
 	_, err = task.Create()
 	if err != nil {
-		return serializer.DBErr("任务创建失败", err)
+		return serializer.DBErr("Failed to create task record", err)
 	}
 
 	// 创建任务监控
diff --git a/service/aria2/manage.go b/service/aria2/manage.go
index 34e17b9..a8cd7f6 100644
--- a/service/aria2/manage.go
+++ b/service/aria2/manage.go
@@ -54,13 +54,13 @@ func (service *DownloadTaskService) Delete(c *gin.Context) serializer.Response {
 	// 查找下载记录
 	download, err := model.GetDownloadByGid(c.Param("gid"), user.ID)
 	if err != nil {
-		return serializer.Err(serializer.CodeNotFound, "下载记录不存在", err)
+		return serializer.Err(serializer.CodeNotFound, "Download record not found", err)
 	}
 
 	if download.Status >= common.Error {
 		// 如果任务已完成，则删除任务记录
 		if err := download.Delete(); err != nil {
-			return serializer.Err(serializer.CodeDBError, "任务记录删除失败", err)
+			return serializer.DBErr("Failed to delete task record", err)
 		}
 		return serializer.Response{}
 	}
@@ -68,11 +68,11 @@ func (service *DownloadTaskService) Delete(c *gin.Context) serializer.Response {
 	// 取消任务
 	node := cluster.Default.GetNodeByID(download.GetNodeID())
 	if node == nil {
-		return serializer.Err(serializer.CodeInternalSetting, "目标节点不可用", err)
+		return serializer.Err(serializer.CodeNodeOffline, "", err)
 	}
 
 	if err := node.GetAria2Instance().Cancel(download); err != nil {
-		return serializer.Err(serializer.CodeNotSet, "操作失败", err)
+		return serializer.Err(serializer.CodeNotSet, "Operation failed", err)
 	}
 
 	return serializer.Response{}
@@ -86,17 +86,17 @@ func (service *SelectFileService) Select(c *gin.Context) serializer.Response {
 	// 查找下载记录
 	download, err := model.GetDownloadByGid(c.Param("gid"), user.ID)
 	if err != nil {
-		return serializer.Err(serializer.CodeNotFound, "下载记录不存在", err)
+		return serializer.Err(serializer.CodeNotFound, "Download record not found", err)
 	}
 
 	if download.StatusInfo.BitTorrent.Mode != "multi" || (download.Status != common.Downloading && download.Status != common.Paused) {
-		return serializer.Err(serializer.CodeNoPermissionErr, "此下载任务无法选取文件", err)
+		return serializer.ParamErr("You cannot select files for this task", nil)
 	}
 
 	// 选取下载
 	node := cluster.Default.GetNodeByID(download.GetNodeID())
 	if err := node.GetAria2Instance().Select(download, service.Indexes); err != nil {
-		return serializer.Err(serializer.CodeNotSet, "操作失败", err)
+		return serializer.Err(serializer.CodeNotSet, "Operation failed", err)
 	}
 
 	return serializer.Response{}
diff --git a/service/callback/upload.go b/service/callback/upload.go
index 698d50c..25390bc 100644
--- a/service/callback/upload.go
+++ b/service/callback/upload.go
@@ -112,7 +112,7 @@ func ProcessCallback(service CallbackProcessService, c *gin.Context) serializer.
 	// 创建文件系统
 	fs, err := filesystem.NewFileSystemFromCallback(c)
 	if err != nil {
-		return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
+		return serializer.Err(serializer.CodeCreateFSError, err.Error(), err)
 	}
 	defer fs.Recycle()
 
@@ -156,7 +156,7 @@ func (service *OneDriveCallback) PreProcess(c *gin.Context) serializer.Response
 	// 创建文件系统
 	fs, err := filesystem.NewFileSystemFromCallback(c)
 	if err != nil {
-		return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
+		return serializer.Err(serializer.CodeCreateFSError, "", err)
 	}
 	defer fs.Recycle()
 
@@ -166,7 +166,7 @@ func (service *OneDriveCallback) PreProcess(c *gin.Context) serializer.Response
 	// 获取文件信息
 	info, err := fs.Handler.(onedrive.Driver).Client.Meta(context.Background(), "", uploadSession.SavePath)
 	if err != nil {
-		return serializer.Err(serializer.CodeUploadFailed, "文件元信息查询失败", err)
+		return serializer.Err(serializer.CodeQueryMetaFailed, "", err)
 	}
 
 	// 验证与回调会话中是否一致
@@ -181,7 +181,7 @@ func (service *OneDriveCallback) PreProcess(c *gin.Context) serializer.Response
 
 	if isSizeCheckFailed || !strings.EqualFold(info.GetSourcePath(), actualPath) {
 		fs.Handler.(onedrive.Driver).Client.Delete(context.Background(), []string{info.GetSourcePath()})
-		return serializer.Err(serializer.CodeUploadFailed, "文件信息不一致", err)
+		return serializer.Err(serializer.CodeMetaMismatch, "", err)
 	}
 	service.Meta = info
 	return ProcessCallback(service, c)
@@ -192,7 +192,7 @@ func (service *COSCallback) PreProcess(c *gin.Context) serializer.Response {
 	// 创建文件系统
 	fs, err := filesystem.NewFileSystemFromCallback(c)
 	if err != nil {
-		return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
+		return serializer.Err(serializer.CodeCreateFSError, "", err)
 	}
 	defer fs.Recycle()
 
@@ -202,12 +202,12 @@ func (service *COSCallback) PreProcess(c *gin.Context) serializer.Response {
 	// 获取文件信息
 	info, err := fs.Handler.(cos.Driver).Meta(context.Background(), uploadSession.SavePath)
 	if err != nil {
-		return serializer.Err(serializer.CodeUploadFailed, "文件信息不一致", err)
+		return serializer.Err(serializer.CodeMetaMismatch, "", err)
 	}
 
 	// 验证实际文件信息与回调会话中是否一致
 	if uploadSession.Size != info.Size || uploadSession.Key != info.CallbackKey {
-		return serializer.Err(serializer.CodeUploadFailed, "文件信息不一致", err)
+		return serializer.Err(serializer.CodeMetaMismatch, "", err)
 	}
 
 	return ProcessCallback(service, c)
@@ -218,7 +218,7 @@ func (service *S3Callback) PreProcess(c *gin.Context) serializer.Response {
 	// 创建文件系统
 	fs, err := filesystem.NewFileSystemFromCallback(c)
 	if err != nil {
-		return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
+		return serializer.Err(serializer.CodeCreateFSError, "", err)
 	}
 	defer fs.Recycle()
 
@@ -228,12 +228,12 @@ func (service *S3Callback) PreProcess(c *gin.Context) serializer.Response {
 	// 获取文件信息
 	info, err := fs.Handler.(*s3.Driver).Meta(context.Background(), uploadSession.SavePath)
 	if err != nil {
-		return serializer.Err(serializer.CodeUploadFailed, "文件信息不一致", err)
+		return serializer.Err(serializer.CodeMetaMismatch, "", err)
 	}
 
 	// 验证实际文件信息与回调会话中是否一致
 	if uploadSession.Size != info.Size {
-		return serializer.Err(serializer.CodeUploadFailed, "文件信息不一致", err)
+		return serializer.Err(serializer.CodeMetaMismatch, "", err)
 	}
 
 	return ProcessCallback(service, c)
@@ -244,7 +244,7 @@ func (service *UploadCallbackService) PreProcess(c *gin.Context) serializer.Resp
 	// 创建文件系统
 	fs, err := filesystem.NewFileSystemFromCallback(c)
 	if err != nil {
-		return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
+		return serializer.Err(serializer.CodeCreateFSError, "", err)
 	}
 	defer fs.Recycle()
 
@@ -254,7 +254,7 @@ func (service *UploadCallbackService) PreProcess(c *gin.Context) serializer.Resp
 	// 验证文件大小
 	if uploadSession.Size != service.Size {
 		fs.Handler.Delete(context.Background(), []string{uploadSession.SavePath})
-		return serializer.Err(serializer.CodeUploadFailed, "文件大小不一致", nil)
+		return serializer.Err(serializer.CodeMetaMismatch, "", err)
 	}
 
 	return ProcessCallback(service, c)
diff --git a/service/explorer/directory.go b/service/explorer/directory.go
index 844f812..cd03999 100644
--- a/service/explorer/directory.go
+++ b/service/explorer/directory.go
@@ -18,7 +18,7 @@ func (service *DirectoryService) ListDirectory(c *gin.Context) serializer.Respon
 	// 创建文件系统
 	fs, err := filesystem.NewFileSystemFromContext(c)
 	if err != nil {
-		return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
+		return serializer.Err(serializer.CodeCreateFSError, "", err)
 	}
 	defer fs.Recycle()
 
@@ -48,7 +48,7 @@ func (service *DirectoryService) CreateDirectory(c *gin.Context) serializer.Resp
 	// 创建文件系统
 	fs, err := filesystem.NewFileSystemFromContext(c)
 	if err != nil {
-		return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
+		return serializer.Err(serializer.CodeCreateFSError, "", err)
 	}
 	defer fs.Recycle()
 
diff --git a/service/explorer/file.go b/service/explorer/file.go
index 15c88b2..cb4ecfe 100644
--- a/service/explorer/file.go
+++ b/service/explorer/file.go
@@ -267,7 +267,7 @@ func (service *DownloadService) Download(ctx context.Context, c *gin.Context) se
 	// 创建文件系统
 	fs, err := filesystem.NewFileSystemFromContext(c)
 	if err != nil {
-		return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
+		return serializer.Err(serializer.CodeCreateFSError, "", err)
 	}
 	defer fs.Recycle()