I’m not sure of what you are talking about here. If you own the My Cloud and have been using SmartWare to back up your computers/devices then you should not have a problem retrieving your files.
WD Sync is different from your backups made by SmartWare. I have all my information backed up on my original My Cloud by SmartWare. I also have my desktop backed up on my second My Cloud by SmartWare and some files are synced to this My Cloud by WD Sync that results in them being synced on both my desktop and laptop. See example images below for Cloud Access devices and then my shares.
