3-2-1-1-0 Backup Rule

The 3-2-1-1-0 rule is a practical backup strategy for reducing the chance of losing important data such as databases, documents, or photos: 3 copies of the data in total. 2 different storage types or media. 1 copy stored off-site. 1 copy kept offline or immutable. 0 backup errors after regularly testing that restores actually work. The point is to make sure a single hardware failure, deletion,…