I read that Internet Archive keeps 2 copies of all their data. Storj, the decentralized storage service, is currently in Chap 11 bankruptcy, mostly IMO because of incompetent management. They pay their node operators, the guys that actually maintain the hard drive space, $1.35/TB/mo to store data. (However it costs Storj 1.8x that because of erasure coding). They still have way more available capacity going unused, so it's likely they could lower the payout rate even further and have talked about doing that.
Internet Archive could buy Storj, probably for not much, keep 1 copy of their archive on the IA custom server setup they have now, keep the other copy on Storj, and free up half of the IA disk space. Storj automagically uploads data to 54 nodes, any 29 of which can reconstruct the original data (54/29 is where the 1.8 expansion factor occurs).
Internet Archive could buy Storj, probably for not much, keep 1 copy of their archive on the IA custom server setup they have now, keep the other copy on Storj, and free up half of the IA disk space. Storj automagically uploads data to 54 nodes, any 29 of which can reconstruct the original data (54/29 is where the 1.8 expansion factor occurs).