Oh sure, there&#x27;s lots to say about the design and effective use of a backup regime.  I agree with all that stuff.<p>But if you&#x27;re going to condense it to a &quot;rule&quot; that will help people not well-versed in the field, that rule can only be &quot;MAKE BACKUPS!&quot;, because at least 90% of the data loss scenarios in the real world happen because simple backups weren&#x27;t made.<p>Don&#x27;t make it more complicated than it is, because someone will stop to do it &quot;right&quot; and then lose data because they didn&#x27;t just make a copy on a USB stick.