RE: zfs: backup unencrypted datasets into encrypted datasets

> cannot receive new filesystem stream: destination 'backups/root/orpheus-home' exists
...
> cannot receive new filesystem stream: zfs receive -F cannot be used to destroy an encrypted filesystem or overwrite an unencrypted one with an encrypted one

It looks like you've accidentally created a filesystem on the USB drive, and "-F" is refusing to destroy it for you. Try manually destroying it first, then resend. Check what `zfs list backups' says.

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