Your data strategy should've also included guidelines for backups. What is the $3-2-1$ rule in the context of data backup plans?

Backup data once, store it in three different locations, and keep all copies onsite

Backup data twice, store it in two different locations, and keep one copy offsite

Backup data three times, store it in one location, and keep two media types.

Backup data three times, store it in two different media types, and keep one copy offsite.