I feel like a 321 backup is kind of inhibitory specifically 2 different mediums. Hard disks are by far the cheapest and it seams a bit excessive storing your entire database on Ssd's or something like that.
I'd start by deciding what your goals are, so you know what to work towards in terms of hardware, software, and processes. Once you've got some sort of an idea, explore ways to accomplish it and post your questions in this community. It can be super overwhelming to get started, but the research and problem-solving is half the fun.
Edited post with goal, I suppose I'm looking for learning resources.
Start by hoarding your own data, on your own, existing devices/hardware.
Consider how to categorize or not your data.
Aside from proper backups (I have cloud and local) I've actually been doing this for a while albeit in a pretty rudimentary fashion. I'm pretty happy with my existing categorization. I am looking to make it more robust than a copy on an external hard drive + YouTube for big videos/a cloud storage service, especially since I have hit the point where I need to get myself some more storage.
What are you trying to accomplish?
Edited post with goal, I suppose I'm just looking for information aimed at new people
I don't know about any newbie friendly resources, would be interested in that as well. I guess most datahoarders are also selfhosters, so I'd to look into that as well. Start small, get a smalll cheap, used computer, maybe with an external drive. Check out some docker(-compose) tutorials.
As for data corruption this is something I thought about recently as well. I have not seen a good solution, someone said ZFS with redundancy will autocorrect bitrot. Not sure if this is even possible (or practical) on a computer (can you have the redundancy in another pool partition?)
Who are we?
We are digital librarians. Among us are represented the various reasons to keep data -- legal requirements, competitive requirements, uncertainty of permanence of cloud services, distaste for transmitting your data externally (e.g. government or corporate espionage), cultural and familial archivists, internet collapse preppers, and people who do it themselves so they're sure it's done right. Everyone has their reasons for curating the data they have decided to keep (either forever or For A Damn Long Time). Along the way we have sought out like-minded individuals to exchange strategies, war stories, and cautionary tales of failures.
We are one. We are legion. And we're trying really hard not to forget.
-- 5-4-3-2-1-bang from this thread