The Unreferenced Data section lists the leftover data after a backup job was deleted.
This data takes up the disk space and should be deleted.
Alternatively, you may try to re-import the non-referenced data and restore it to the job history list.
› Backup & Disaster Recovery › Appliance Management Console › Settings tab › Unreferenced Data
Unreferenced Data
- Summary:Description of the Unreferenced Data section on the Settings tab in the Management Console of the Cloud Failover Appliance.