Lto tape. But I only have 15tb

It quickly becomes cost effective when you actually need the data to be safe. Far easier to have off site backups. I have never had a problem , but I like to have offline backup. Most of the time my data is static. So I am only backing up projects files ans changes for the most part.

If you have 40+ tb of dynamic data I can’t help there.

Edit: I buy used drives that are usually 2 generations old, so I got lto-5 drives when lto 7 was new. The used drives may be less reliable but used drives can be 1/10th the price of the newest ones.

Plasma TV’s while desired were not popular. I’m still using mine, but I was the only one who had one.