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.
I considered Proton Drive but stopped when I realized that if I did then access to my email would be contingent on keeping up to date with my subscription, where it wouldn’t on the free tier.