@fuchsiii
IMHO as #Flash prices continue to fall faster than #HDD's can, you'll likely want to see something like the #NeoFloppy:
https://github.com/KBtechnologies/NeoFloppy/blob/main/neofloppy.specification.md

As it also allows for automatic and human-readable lables...
https://en.wikipedia.org/wiki/Tape_label

Basically you're having a very primitive #NearlineStorage setup there...
https://en.wikipedia.org/wiki/Nearline_storage
https://oxytodon.com/@fuchsiii/110429459135079058

Otherwise consider a real #backup server like #Proxmox Backup Server:
https://en.m.wikipedia.org/wiki/Proxmox_Backup_Server