Keep it about datahoarding.
Rules
If you find anything specific to programming languages and how to save something like all of Python w/libraries & documentation, or especially this with Arduino and Maker stuff with libraries docs and hardware documentation that would be super helpful.
Is anyone selling used hard drives? That would be another really helpful thing.
For running multiple external drives, don't forget about your power needs - I've had great success with portable power stations that can keep your setup running during outages when backing up critical data, and you can compare the best options on gearscouts.com to find ones with the best $/Wh ratio for LFP batteries.
Why does the internet archive make it so difficult to contribute to their storage? I have no found a single guide that allows non-technical users to go "oh, I have 100GB of space on my hard-drive, let me donate it to the internet archive". All I find is something about torrents, but I have to manually go to everything and select from millions of items, which things to torrent.
Kind of ironic that the site to backup the internet hasn't figured out how to backup itself.