Windows creates Thumbs.db/desktop.ini and macOS creates .DS_Store file that is used to save folder personalization and file thumbnails. When creating a local backup to save into a empty folder that contains such files (hidden for the user by default), Minarca Client states that the folder isn't empty, but user enter into the folder and it's empty. I do believe that hidden files should be excluded from file/folder count from repository to avoid such issue while creating a local backup.