# Redundancy != Backup

RAID is redundancy. Clusters are redundancy. It's about keeping services available, not preventing data loss.

Backups are about preventing data loss.

For a long time, the [3-2-1 backup rule](https://www.backblaze.com/blog/the-3-2-1-backup-strategy/) has been considered the most reasonable solution most of us will get. Of course, now I see people [saying it sucks](https://www.unitrends.com/blog/3-2-1-backup-sucks). Well, you do what you can afford, I guess.

It's worth noting that you can self host an off site backup, if you have a second physical location you can use. It can be a relatives house or you can even rent a space on an existing server farm. The main point is that it's not in the same building as the original copy.