Tape drive and Bareos/Bacula "just works"

Absolutely not worth it tho. Drives are hideously expensive which means they only start making sense where you have at least dozens of tapes.

There is an advantage of tapes not being electrically connected most of the time so lightning strike will not burn your archives, I have pondered making a separate box with a bunch of hard drives that boots once a month and just copies last months of backups on hard drives, powered from solar or something just to separate from the network