I used to use Backblaze B2, which had cheaper egress at the cost of slightly more expensive storage (I think ~$5/TB/mo, with free egress up to 3x all current storage?) So I paid $20. But at some point AWS opened a datacenter near me, and I couldn't ignore how much faster data transfers got.
The point is the cost doesn't scale well.
An LTO drive is easily $10.000. You can restore a lot of S3 data for that amount of money. Sadly getting cheaper tape options is not really possible anymore.
Ah that sucks :(
Rule #25: Try to avoid making what one may purchase, as the total cost is often many times higher than first assumed.
It is tempting for many, but often doesn't end well for businesses. =3
Anecdotally, I have seen Tape sets fail in production settings, as a remote office location admin was doing incremental backups... and the sick tape drive kept silently damaging each daily roll-back attempt. They may fail ungracefully in an archival context.
I do not deny a janky BD-R drive option is situation specific, but for small projects I am fine with a 25GB disc $25.80/TiB solution with the occasional big file $62.42/TiB hit for 100G/128G EOL discs.
HDD are less hassle, still hit below $34.63/TiB, and last a few years. Not a bad fall back option if you still have old inventory. =3