Yeah, I’m falling on this too. A client with write-only privs to a buckets on multiple cloud storage providers is literally the most durable backup in human existence right now. Like nothing else will get you worldwide DR and 30+ 9’s of durability.

3 (designed for) 10 9’s systems whose failure modes are wholly independent might be 30 9s.

I strongly suspect (as in “for the right price would stake my life on it”) that there are some common failure modes across the major cloud vendors’ offerings.

Your advice is directionally sound (and is what I do for family docs and photos); I just think it has fewer meaningless 9s than you’re imagining.

It's probably not a bad idea, but if they're all linked to a single e-mail account/provider, things might turn sour quickly.

Sorry, just riffing on the “RAID is not a backup” that gets yelled at everybody who ever did an rm -rf on their raid by accident…