Report Why Are Some Disk Backup Sets Not Recognized? in Server, SBS and Multi Server Posted September 1, 2011 Something that has tripped me up in the past is trying to point directly to a backup folder. For e.g. if my backup is in d:\Retrospect\Backupname I have to point to d: only, then choose from the list of backups that Retrospect finds. Retrospect looks for the Retrospect folder and zero-byte Dantz file within it.