What you may want to do is recover the space on the device that previously had the "faulty" backups
Go back into menu -> setup -> Vix -> backup manager press menu again and set up the previous location/device. Then menu -> setup -> Vix -> backup manager and delete the backus you find there. Then setup your new location again.
Do the same with image manager.
Maybe also check after the update that that your backup location is still pointing to your new location.