I had backblaze, and it’s really a bummer they don’t support linux. The closest one I’ve found is Icedrive, but it costs a bit more. I don’t mind paying a bit more though for a FOSS solution (technially not free but yeah). I probably only have 2 TB of actual important stuff but it would be nice to have more for future.
This won’t work for you because it’s not enough space, but other people might consider paying money to a place like SDF. I think it was $3 a month (IIRC) for 800 GB of space, and it’s for a good cause.
I use rsync and gocryptfs to back my stuff up there. I also have local hard drives for backups.
Maybe there’s another pubnix that you can pay to get more storage.
Back in the day, I had local hard drives that I would mirror and sneakernet to my friend’s house every couple weeks. We’d trade drives and then we’d have an off-site.
If I weren’t using SDF, I’d probably set up a home server someplace or talk to a friend who already had one and rsync to that.
seconding SDF. they’ve also got great resources such as a cool mastodon server/lemmy/etc. the unix shell is neat too