diff --git a/drivers/base/cache.go b/drivers/base/cache.go
index 5ba0b0a8..e702cf20 100644
--- a/drivers/base/cache.go
+++ b/drivers/base/cache.go
@@ -5,6 +5,7 @@ import (
 	"github.com/Xhofe/alist/conf"
 	"github.com/Xhofe/alist/model"
 	"github.com/Xhofe/alist/utils"
+	log "github.com/sirupsen/logrus"
 )
 
 func KeyCache(path string, account *model.Account) string {
@@ -21,5 +22,7 @@ func GetCache(path string, account *model.Account) (interface{}, error) {
 }
 
 func DeleteCache(path string, account *model.Account) error {
-	return conf.Cache.Delete(conf.Ctx, KeyCache(path, account))
+	err := conf.Cache.Delete(conf.Ctx, KeyCache(path, account))
+	log.Debugf("delete cache %s: %+v", path, err)
+	return err
 }
diff --git a/server/webdav/file.go b/server/webdav/file.go
index 26e1773e..885bee99 100644
--- a/server/webdav/file.go
+++ b/server/webdav/file.go
@@ -203,6 +203,7 @@ func slashClean(name string) string {
 func moveFiles(ctx context.Context, fs *FileSystem, src string, dst string, overwrite bool) (status int, err error) {
 	src = utils.ParsePath(src)
 	dst = utils.ParsePath(dst)
+	log.Debugf("move %s -> %s", src, dst)
 	if src == dst {
 		return http.StatusMethodNotAllowed, errDestinationEqualsSource
 	}
@@ -230,6 +231,7 @@ func moveFiles(ctx context.Context, fs *FileSystem, src string, dst string, over
 func copyFiles(ctx context.Context, fs *FileSystem, src string, dst string, overwrite bool, depth int, recursion int) (status int, err error) {
 	src = utils.ParsePath(src)
 	dst = utils.ParsePath(dst)
+	log.Debugf("move %s -> %s", src, dst)
 	if src == dst {
 		return http.StatusMethodNotAllowed, errDestinationEqualsSource
 	}
diff --git a/server/webdav/webdav.go b/server/webdav/webdav.go
index 2823aa7c..16e62fce 100644
--- a/server/webdav/webdav.go
+++ b/server/webdav/webdav.go
@@ -46,6 +46,7 @@ func (h *Handler) stripPrefix(p string) (string, int, error) {
 func isPathExist(ctx context.Context, fs *FileSystem, path string) (bool, FileInfo) {
 	file, err := fs.File(path)
 	if err != nil {
+		log.Debug(err)
 		return false, nil
 	}
 	return true, file