>>352
I've read DVD's will last quite a long time under proper conditions. Even at 20 years it's still the best and cheapest way to archive content. Online hosting is very unstable, no way I'm trusting archive.org to stay online for decades, and trusting torrents to remain seeded is even more silly. M-disk is an option, but I vaguely recall reading that the claims are exaggerated and it's kind of a meme. I'll probably still consider it one day depending on how much more it's going to cost.