3-2-1 RULE No matter what type of device you use to back up your data, there is no way to guarantee against data loss. The best way to truly protect your data is to have multiple copies. For this reason, we always recommend following the 3-2-1 rule:
3 copies of your data at all times—one working copy and two backups
2 copies on local devices
1 copy kept off-site or in the cloud
We have had many, many customers who thought they had backups but didn’t. Here are some of the more common problems that we have seen:
The backup software wasn’t operating correctly
The files on the backup device were corrupt
The backup device had failed long ago without the customer’s knowledge
Both the origin device and the backup device were in the same building, and that building experienced a fire, flood or other disaster
Following the 3-2-1 rule would have helped most of these customers.
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