diff --git a/middleware/auth.go b/middleware/auth.go
index 731b517..885d7a4 100644
--- a/middleware/auth.go
+++ b/middleware/auth.go
@@ -97,8 +97,8 @@ func WebDAVAuth() gin.HandlerFunc {
 		}
 
 		// 密码正确？
-		ok, _ = expectedUser.CheckPassword(password)
-		if !ok {
+		webdav, err := model.GetWebdavByPassword(password, expectedUser.ID)
+		if err != nil {
 			c.Status(http.StatusUnauthorized)
 			c.Abort()
 			return
@@ -112,6 +112,7 @@ func WebDAVAuth() gin.HandlerFunc {
 		}
 
 		c.Set("user", &expectedUser)
+		c.Set("webdav", webdav)
 		c.Next()
 	}
 }
diff --git a/models/folder.go b/models/folder.go
index 1366f71..46b9b55 100644
--- a/models/folder.go
+++ b/models/folder.go
@@ -15,6 +15,7 @@ type Folder struct {
 	Name     string `gorm:"unique_index:idx_only_one_name"`
 	ParentID *uint  `gorm:"index:parent_id;unique_index:idx_only_one_name"`
 	OwnerID  uint   `gorm:"index:owner_id"`
+	PolicyID uint   // Webdav下挂载的存储策略ID
 
 	// 数据库忽略字段
 	Position string `gorm:"-"`
diff --git a/models/migration.go b/models/migration.go
index 94f8a3d..60c6ffe 100644
--- a/models/migration.go
+++ b/models/migration.go
@@ -30,7 +30,7 @@ func migration() {
 		DB = DB.Set("gorm:table_options", "ENGINE=InnoDB")
 	}
 	DB.AutoMigrate(&User{}, &Setting{}, &Group{}, &Policy{}, &Folder{}, &File{}, &StoragePack{}, &Share{},
-		&Task{}, &Download{}, &Tag{})
+		&Task{}, &Download{}, &Tag{}, &Webdav{})
 
 	// 创建初始存储策略
 	addDefaultPolicy()
diff --git a/models/share.go b/models/share.go
index e1b5290..3fe636d 100644
--- a/models/share.go
+++ b/models/share.go
@@ -220,6 +220,11 @@ func (share *Share) Delete() error {
 	return DB.Model(share).Delete(share).Error
 }
 
+// DeleteShareBySourceIDs 根据原始资源类型和ID删除文件
+func DeleteShareBySourceIDs(sources []uint, isDir bool) error {
+	return DB.Where("source_id in (?) and is_dir = ?", sources, isDir).Delete(&Share{}).Error
+}
+
 // ListShares 列出UID下的分享
 func ListShares(uid uint, page, pageSize int, order string, publicOnly bool) ([]Share, int) {
 	var (
diff --git a/models/user.go b/models/user.go
index 8583711..28e3036 100644
--- a/models/user.go
+++ b/models/user.go
@@ -135,17 +135,20 @@ func (user *User) GetRemainingCapacity() uint64 {
 }
 
 // GetPolicyID 获取用户当前的存储策略ID
-func (user *User) GetPolicyID() uint {
+func (user *User) GetPolicyID(prefer uint) uint {
+	if prefer == 0 {
+		prefer = user.OptionsSerialized.PreferredPolicy
+	}
 	// 用户未指定时，返回可用的第一个
-	if user.OptionsSerialized.PreferredPolicy == 0 {
+	if prefer == 0 {
 		if len(user.Group.PolicyList) != 0 {
 			return user.Group.PolicyList[0]
 		}
 		return 1
 	}
 	// 用户指定时，先检查是否为可用策略列表中的值
-	if util.ContainsUint(user.Group.PolicyList, user.OptionsSerialized.PreferredPolicy) {
-		return user.OptionsSerialized.PreferredPolicy
+	if util.ContainsUint(user.Group.PolicyList, prefer) {
+		return prefer
 	}
 	// 不可用时，返回第一个
 	if len(user.Group.PolicyList) != 0 {
@@ -205,7 +208,7 @@ func (user *User) AfterFind() (err error) {
 	}
 
 	// 预加载存储策略
-	user.Policy, _ = GetPolicyByID(user.GetPolicyID())
+	user.Policy, _ = GetPolicyByID(user.GetPolicyID(0))
 	return err
 }
 
diff --git a/models/user_test.go b/models/user_test.go
index b552876..0da77c0 100644
--- a/models/user_test.go
+++ b/models/user_test.go
@@ -166,7 +166,7 @@ func TestUser_GetPolicyID(t *testing.T) {
 	for key, testCase := range testCases {
 		newUser.OptionsSerialized.PreferredPolicy = testCase.preferred
 		newUser.Group.PolicyList = testCase.available
-		asserts.Equal(testCase.expected, newUser.GetPolicyID(), "测试用例 #%d 未通过", key)
+		asserts.Equal(testCase.expected, newUser.GetPolicyID(0), "测试用例 #%d 未通过", key)
 	}
 }
 
diff --git a/models/webdav.go b/models/webdav.go
new file mode 100644
index 0000000..2b58a8f
--- /dev/null
+++ b/models/webdav.go
@@ -0,0 +1,19 @@
+package model
+
+import "github.com/jinzhu/gorm"
+
+// Webdav 应用账户
+type Webdav struct {
+	gorm.Model
+	Name     string // 应用名称
+	Password string `gorm:"unique_index:password_only_on"` // 应用密码
+	UserID   uint   `gorm:"unique_index:password_only_on"` // 用户ID
+	Root     string `gorm:"type:text"`                     // 根目录
+}
+
+// GetWebdavByPassword 根据密码和用户查找Webdav应用
+func GetWebdavByPassword(password string, uid uint) (*Webdav, error) {
+	webdav := &Webdav{}
+	res := DB.Where("user_id = ? and password = ?", uid, password).First(webdav)
+	return webdav, res.Error
+}
diff --git a/pkg/filesystem/driver/cos/handller.go b/pkg/filesystem/driver/cos/handller.go
index 58b0005..cfed904 100644
--- a/pkg/filesystem/driver/cos/handller.go
+++ b/pkg/filesystem/driver/cos/handller.go
@@ -113,6 +113,10 @@ func (handler Driver) Delete(ctx context.Context, files []string) ([]string, err
 		failed = append(failed, v.Key)
 	}
 
+	if len(failed) == 0 {
+		return failed, nil
+	}
+
 	return failed, errors.New("删除失败")
 }
 
diff --git a/pkg/filesystem/manage.go b/pkg/filesystem/manage.go
index af4e728..716ab43 100644
--- a/pkg/filesystem/manage.go
+++ b/pkg/filesystem/manage.go
@@ -190,6 +190,9 @@ func (fs *FileSystem) Delete(ctx context.Context, dirs, files []uint) error {
 		return ErrDBDeleteObjects.WithError(err)
 	}
 
+	// 删除文件记录对应的分享记录
+	model.DeleteShareBySourceIDs(allFileIDs, false)
+
 	// 归还容量
 	var total uint64
 	for _, value := range totalStorage {
@@ -207,6 +210,9 @@ func (fs *FileSystem) Delete(ctx context.Context, dirs, files []uint) error {
 		return ErrDBDeleteObjects.WithError(err)
 	}
 
+	// 删除目录记录对应的分享记录
+	model.DeleteShareBySourceIDs(allFolderIDs, true)
+
 	if notDeleted := len(fs.FileTarget) - len(deletedFileIDs); notDeleted > 0 {
 		return serializer.NewError(
 			serializer.CodeNotFullySuccess,
diff --git a/pkg/filesystem/upload.go b/pkg/filesystem/upload.go
index 9f45bcb..d2a1006 100644
--- a/pkg/filesystem/upload.go
+++ b/pkg/filesystem/upload.go
@@ -172,7 +172,7 @@ func (fs *FileSystem) GetUploadToken(ctx context.Context, path string, size uint
 		serializer.UploadSession{
 			Key:         callbackKey,
 			UID:         fs.User.ID,
-			PolicyID:    fs.User.GetPolicyID(),
+			PolicyID:    fs.User.GetPolicyID(0),
 			VirtualPath: path,
 			Name:        name,
 			Size:        size,
diff --git a/pkg/webdav/file.go b/pkg/webdav/file.go
index a5241b0..983696e 100644
--- a/pkg/webdav/file.go
+++ b/pkg/webdav/file.go
@@ -48,8 +48,8 @@ func moveFiles(ctx context.Context, fs *filesystem.FileSystem, src FileInfo, dst
 	} else {
 		err = fs.Move(
 			ctx,
-			fileIDs,
 			folderIDs,
+			fileIDs,
 			src.GetPosition(),
 			path.Dir(dst),
 		)
@@ -81,7 +81,7 @@ func copyFiles(ctx context.Context, fs *filesystem.FileSystem, src FileInfo, dst
 			return http.StatusInternalServerError, err
 		}
 	} else {
-		err := fs.Copy(ctx, []uint{src.(*model.File).ID}, []uint{}, src.(*model.File).Position, dst)
+		err := fs.Copy(ctx, []uint{}, []uint{src.(*model.File).ID}, src.(*model.File).Position, path.Dir(dst))
 		if err != nil {
 			return http.StatusInternalServerError, err
 		}
diff --git a/pkg/webdav/webdav.go b/pkg/webdav/webdav.go
index 4229c2f..58099bd 100644
--- a/pkg/webdav/webdav.go
+++ b/pkg/webdav/webdav.go
@@ -356,6 +356,17 @@ func (h *Handler) handlePut(w http.ResponseWriter, r *http.Request, fs *filesyst
 		fs.Use("AfterValidateFailed", filesystem.HookGiveBackCapacity)
 		ctx = context.WithValue(ctx, fsctx.FileModelCtx, *originFile)
 	} else {
+		// 检查父目录指定存储策略
+		if exist, folder := fs.IsPathExist(filePath); exist {
+			if folder.PolicyID != 0 {
+				// 尝试获取并重设存储策略
+				if policy, err := model.GetPolicyByID(fs.User.GetPolicyID(folder.PolicyID)); err == nil {
+					fs.User.Policy = policy
+					fs.DispatchHandler()
+				}
+			}
+		}
+
 		// 给文件系统分配钩子
 		fs.Use("BeforeUpload", filesystem.HookValidateFile)
 		fs.Use("BeforeUpload", filesystem.HookValidateCapacity)
diff --git a/routers/controllers/webdav.go b/routers/controllers/webdav.go
index 1d72316..4f99f4a 100644
--- a/routers/controllers/webdav.go
+++ b/routers/controllers/webdav.go
@@ -1,6 +1,7 @@
 package controllers
 
 import (
+	model "github.com/HFO4/cloudreve/models"
 	"github.com/HFO4/cloudreve/pkg/filesystem"
 	"github.com/HFO4/cloudreve/pkg/util"
 	"github.com/HFO4/cloudreve/pkg/webdav"
@@ -24,5 +25,18 @@ func ServeWebDAV(c *gin.Context) {
 		return
 	}
 
+	if webdavCtx, ok := c.Get("webdav"); ok {
+		application := webdavCtx.(*model.Webdav)
+
+		// 重定根目录
+		if application.Root != "/" {
+			if exist, root := fs.IsPathExist(application.Root); exist {
+				root.Position = ""
+				root.Name = "/"
+				fs.Root = root
+			}
+		}
+	}
+
 	handler.ServeHTTP(c.Writer, c.Request, fs)
 }