I just keep all my archives in zfs mirror disks, which I every 4 years buy 2 new of and copy them to there. The old ones are not deleted, just stored offline.

I just keep all my archives in zfs mirror disks, which I every 4 years buy 2 new of and copy them to there. The old ones are not deleted, just stored offline. Then I also have usb-memory sticks which I gave to family.