Backup philosophy

Mindset

• 3-2-1 Backup strategy

• Restore strategy is more important than backup strategy

• Testing backup plans would not be a bad idea. If we don't test backups, we don't have them. We must recheck backup/restore plans monthly, quarterly or yearly

The 3-2-1 Rule

• 3 means: having at least 3 total copies of data

  - local machine
  - external hard drive/removeable disk device
  - cloud storage

• 2 means: keep the backed-up data on 2 different storage types

  - local machine
  - cloud

• 1 means: having at least 1 copy offsite

  Even if you have two copies on two separate storage types but both are stored onsite, 
  a local disaster could wipe out both of them. 
  Keep a third copy in an offsite location, like the cloud.