I use Backblaze's B2 service for both backup (via restic) and archival storage (via git-annex). I only maintain a distinction between the two in case I ever wan

I use Backblaze's B2 service for both backup (via restic) and archival storage (via git-annex). I only maintain a distinction between the two in case I ever want to move to another service, and also because git-annex and restic have different strengths that make them more or less suitable for unchanging archives and often changing backups respectively. Between the two I have about 1 TB stored with them. I have yet needed to do a full restore, but I do partial restores from time to time to double-check my backup procedures and every time it's done what I wanted. My monthly costs are usually a bit under $5. Note I essentially never use B2's API directly, and only use it as a backend through wrappers others have written, so I have no real experience with how good its API is. One of the few times I did try the API, I remember at one point I think I was getting Java exceptions back in the error messages, which was mildly concerning from a hygiene perspective and made for rather terrible error messages, but no sensitive data was being emitted. I also think that's been fixed. The bottom line is that B2 has worked fine for me and at a good price point.