for 81 euro/month.
You can probably find something cheaper from their auction servers.
I've got a storage VPS with HostHatch for my backups. It's one of their Black Friday deals from a few years ago - 10TB storage for $10/month. Not sure they'll offer that pricing again, but they did have something similar for around double the price during sales last year (still a good deal!)
Tape drives are too expensive unless you have 100s of TB of data, I think
The drives are expensive, and some manufacturers have expensive proprietary software, but the tapes themselves are cheaper per TB than hard drives, and they usually have a 20 or 30 year life guarantee. People seem to think tapes is old technology but modern tapes can fit 18TB uncompressed (they say 45 TB compressed but idk).
The default tier of AWS glacier uses tape, which is why data retrieval takes a few hours from when you submit the request to when you can actually download the data, and costs a lot.