Why two backups are better than one

A single backup can fail at the same time as the original through theft, fire, ransomware, account deletion or a simple storage error. Independent copies reduce the chance that one event destroys every version.

How it works

A copy on the same computer protects against accidental deletion only in limited cases. A synchronized cloud folder may reproduce a deletion rather than preserve history.

Practical takeaways

Keep multiple generations, isolate at least one copy and test restoration. For a website, include the database, uploaded media, code, configuration and a written recovery procedure.

Redundancy is about different failure modes, not simply counting folders.

In short: A single backup can fail at the same time as the original through theft, fire, ransomware, account deletion or a simple storage error. Independent copies reduce the chance that one event destroys every version.