Why Syncing Isn't a Backup: The 3-2-1 Strategy

Most people think they are safe because they copy files to iCloud or Google Drive. But if you have to remember to do it, you will forget. And even when you do, syncing is not the same as backing up.

The Danger of Syncing

Tools like Syncthing are great for keeping folders identical across your devices. However, this creates a single point of failure. If you accidentally delete a file, that deletion propagates to every other device. If a file gets corrupted, the corruption spreads with it. You haven't preserved the data; you've just synchronized the mistake.

The 3-2-1 Rule

To truly protect your critical data, you need a robust backup strategy. The gold standard is the 3-2-1 rule:

• 3 copies of your data.
• 2 different types of media (for example, your internal drive and an external drive).
• 1 copy stored off-site (such as in the cloud).

Automation Is Key

The best backup is the one you never have to think about. Instead of manual copying, use dedicated backup software like Backblaze. You select the directories you care about, and the software runs automatically in the background. This ensures that even if you delete or corrupt a file, you have a pristine, off-site copy ready to restore.