Consider two separate Backblaze accounts:
https://www.backblaze.com/cloud-backup.html
combined with two bootable backups to external drives using SuperDuper:
https://shirt-pocket.com/SuperDuper/...scription.html
and for complete "all belt and braces" security, TimeMachine backups.
Some kind of external backup is doubly important if you are using an SSD rather than a spinning disk - ask me how I know!
