I have a lot of files in Apple ][ and Apple /// format as well as in HPFS format. And, they are all backed up on tape and on Bernoulli systems which are pseudo SCSI. None of them work with today's systems and there was no easy way to move between systems. This happens. I have friends with Heath PCs and IBM PCs and they can't read DOS disks. I have 8" disks with lots of backups.
I cannot read them and cannot exchange data between these old computers.
I have a friend with a lot of stuff on a LISA! Wow does he have problems.