Thanks, I had already tried it, they errored no matter what.
It's funny but thinking back, the year on the files were 1993...
We are talking about DOS, Windows 3.1, AutoCAD R12 if we are lucky.
The zip utility in use was PKZIP.
Average hard drive size was what 8 MB?
Processor was 286 maybe 386?
The disk volumes converted for these backups went from DOS, FAT16, FAT32, NTFS
?