I still have a lot of old CDs containing various backups. Oh, the
irony: I can read the CDs without difficulty, even though they're
about 15 years old CD-Rs. But back then, I didn't care much about file
formats. Hence, it's some proprietary stuff. I don't have the Windows
software around anymore to actually use those files. Worse, the
company in question got bought by Norton who, in turn, stopped
developing that program.