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.
Proton Drive does not support Linux…
I think there is early beta support in Rclone, but I have seen many reports of it not working well.
Unless I’m misunderstanding it looks like they do work with rclone https://rclone.org/protondrive/
I mean you don’t have to use the desktop app, you can use the browser version. I heavily lean on it to back up my smartphone to be honest. That’s really the most convenient thing for me