Nice article, thank you for sharing. Here is another blog post on the 3-2-1 backup rule, which also covers other popular backup schemes, including 3-2-1-1-0 and 4-3-2: <a href="https://xopero.com/blog/en/the-evolution-of-data-backup-is-the-3-2-1-backup-rule-a-thing-of-the-past/" rel="nofollow">https://xopero.com/blog/en/the-evolution-of-data-backup-is-t...</a>