Running Windows 7 and Disk Manager 12. How can I stop my backup drive overflowing? I have a regular image backup scheduled with Paragon and only want to retain the 4 most recent back ups. Is it possible to schedule the deletion of old backups? If not, is it safe simply to delete backup files in explorer? I have tried deleting items in the archive list but whilst they disappear from the list all the back files remain on the disk drive.