Incomplete backups and off site storage
I'd like to understand how this is supposed to work.
I want to take backups off site but not all, for example a full backup plus the last three differentials. When I try to do a test restore I get multiple "Cannot Find n", generally I have to cancel about 8 times for each one. Then it goes away for maybe an hour, I get tired of waiting so maybe less. The process gets repeated once and then I can do the restore. The restore crashes on Windows (crashes widows itself) and on Windows PE environment and works only on the Linux recovery.
I have tried with different backups from different machines going to different locations - same problem. I have also tried "validating" the backups with the full and differentials which seems to do something but doesn't change the restore issue which still crashes and requires multiple "Cannot find n".
Surely this is a standard use for backup software. Am I missing a step or something?
Thanks in advance