Duplicate jobs not duplicating full jobs correctly.
We have our jobs configured as follows:
1. Daily differential backups to local disk with a 5 day retention
2. Weekly full backups to local disk with an 8 week retention
3. Monthly duplicate jobs to external USB disk with 1 year retention. The final duplicate job of the year, I select to retain all backups on the external storage.
Configured for backup is file store and system state. As I understand it, system state backups can only do full backups, so during the differentials, the system state backups run as full.
The problem is that the duplicate jobs are configured to duplicate the last full backup. Since the last full backup is technically the system state backup run during the differential, that is the only thing that gets duplicated.
I am considering changing the duplicate source to be Full backups rather than last full backup, but I'm concerned that ALL full backups for this server will be duplicated to the external drive, which could potentially be 8 full backups since our retention is 8 weeks, plus all the system state backups in the differentials and fulls that haven't expired yet.