Retention should follow business risk
Not every system needs the same retention. Finance systems, customer data, and production databases may need longer history than cache, temporary files, or test environments.
Split retention by data type, requirement, and consequence. That avoids both unnecessary cost and gaps that only appear during an incident.
RPO and RTO make requirements concrete
RPO describes how much data you can lose. RTO describes how quickly the service needs to be back. Without these two measures, backup easily becomes a technical feature without business priority.
Set the levels per system. A public customer portal and an internal archive rarely have the same requirements.
Test restore before you need it
A restore test shows whether data, permissions, documentation, and responsibility work together. It is not enough to see that the backup job is green.
Plan regular tests and document the result. Backup then becomes a recovery process, not just storage of copies.
