diff --git a/models/policy.go b/models/policy.go
index c742b3e..d58502e 100644
--- a/models/policy.go
+++ b/models/policy.go
@@ -162,6 +162,11 @@ func (policy *Policy) IsPathGenerateNeeded() bool {
 	return policy.Type != "remote"
 }
 
+// IsThumbGenerateNeeded 返回此策略是否需要在上传后生成缩略图
+func (policy *Policy) IsThumbGenerateNeeded() bool {
+	return policy.Type == "local"
+}
+
 // GetUploadURL 获取文件上传服务API地址
 func (policy *Policy) GetUploadURL() string {
 	server, err := url.Parse(policy.Server)
diff --git a/pkg/filesystem/hooks.go b/pkg/filesystem/hooks.go
index d30817d..aab2355 100644
--- a/pkg/filesystem/hooks.go
+++ b/pkg/filesystem/hooks.go
@@ -139,12 +139,9 @@ func HookChangeCapacity(ctx context.Context, fs *FileSystem) error {
 func HookDeleteTempFile(ctx context.Context, fs *FileSystem) error {
 	filePath := ctx.Value(fsctx.SavePathCtx).(string)
 	// 删除临时文件
-	// TODO 其他策略。Exists？
-	if util.Exists(filePath) {
-		_, err := fs.Handler.Delete(ctx, []string{filePath})
-		if err != nil {
-			return err
-		}
+	_, err := fs.Handler.Delete(ctx, []string{filePath})
+	if err != nil {
+		util.Log().Warning("无法清理上传临时文件，%s", err)
 	}
 
 	return nil
@@ -207,12 +204,14 @@ func GenericAfterUpdate(ctx context.Context, fs *FileSystem) error {
 	}
 
 	// 尝试清空原有缩略图并重新生成
-	go func() {
-		if originFile.PicInfo != "" {
-			_, _ = fs.Handler.Delete(ctx, []string{originFile.SourceName + conf.ThumbConfig.FileSuffix})
-			fs.GenerateThumbnail(ctx, &originFile)
-		}
-	}()
+	if originFile.GetPolicy().IsThumbGenerateNeeded() {
+		go func() {
+			if originFile.PicInfo != "" {
+				_, _ = fs.Handler.Delete(ctx, []string{originFile.SourceName + conf.ThumbConfig.FileSuffix})
+				fs.GenerateThumbnail(ctx, &originFile)
+			}
+		}()
+	}
 
 	return nil
 }
@@ -270,7 +269,9 @@ func GenericAfterUpload(ctx context.Context, fs *FileSystem) error {
 	fs.SetTargetFile(&[]model.File{*file})
 
 	// 异步尝试生成缩略图
-	go fs.GenerateThumbnail(ctx, file)
+	if fs.User.Policy.IsThumbGenerateNeeded() {
+		go fs.GenerateThumbnail(ctx, file)
+	}
 
 	return nil
 }
diff --git a/pkg/filesystem/oss/handller.go b/pkg/filesystem/oss/handller.go
index 5e3b687..cd602dd 100644
--- a/pkg/filesystem/oss/handller.go
+++ b/pkg/filesystem/oss/handller.go
@@ -116,7 +116,27 @@ func (handler Handler) Get(ctx context.Context, path string) (response.RSCloser,
 
 // Put 将文件流保存到指定目录
 func (handler Handler) Put(ctx context.Context, file io.ReadCloser, dst string, size uint64) error {
-	return errors.New("未实现")
+	defer file.Close()
+
+	// 初始化客户端
+	if err := handler.InitOSSClient(); err != nil {
+		return err
+	}
+
+	// 凭证有效期
+	credentialTTL := model.GetIntSetting("upload_credential_timeout", 3600)
+
+	options := []oss.Option{
+		oss.Expires(time.Now().Add(time.Duration(credentialTTL) * time.Second)),
+	}
+
+	// 上传文件
+	err := handler.bucket.PutObject(dst, file, options...)
+	if err != nil {
+		return err
+	}
+
+	return nil
 }
 
 // Delete 删除一个或多个文件，
@@ -217,7 +237,7 @@ func (handler Handler) Source(
 
 func (handler Handler) signSourceURL(ctx context.Context, path string, ttl int64, options []oss.Option) (string, error) {
 	// 是否带有 Version ID
-	if versionID, ok := ctx.Value(VersionID).(int64); ok {
+	if _, ok := ctx.Value(VersionID).(int64); ok {
 
 	}
 	signedURL, err := handler.bucket.SignURL(path, oss.HTTPGet, ttl, options...)