I could give them the option to store it in multiple places, other cloud services. Maybe make my own store. I’m not sure it will be worth it for what would be a small edge case. 

Maybe later tho, I’ll keep it in mind. 

No idea. Some redundancy would make it more robust, but may come at the expense of user experience. Email it to somebody?

anon

Do you not understand that the solution should address mainstream usage and not for nerds?

rsync kills the entire premise. You might as well use a metal plate. Same target users...

At that point they should just use a hardware wallet. This is supposed to be the convenient and easy option. 

rsync, you provide the server and ssh secret key in a config setting.

there are also comercial rsync backends, like rsync net. 

standardcrypto

That's definitely an interesting edge case, with this design you could keep the encrypted backups anywhere, where would you suggest?