Unfortunately none of those numbers are really even close to correct (the discussion is always fun, but the folks in r/datahoarder are often not correctly informed. textfiles has more patience for it than I do). It would probably cost around 1.5M in drives, even at reasonable current enterprise volume pricing, to back up the 60+ PB of unique data in the Internet Archive (plus, as someone does note in that thread, the cost of running them -- even if it were a static backup to cold disks, you still need chassis to run them in for the backup process, space and infra for them, electricity, people, &c). I don't know offhand how much space the contents of the Wayback currently take up, but it's definitely an order of magnitude more than that number as well.