The used and total storage information displayed on the system Monitor page is incorrect where it doesn't reflect the actual sizes that is seen NFS mount(s) used for archival.
Aria Operations for Logs 8.X
The discrepancy is due to a cosmetic issue in the user interface (UI), where the storage values displayed on the System Monitor page do not accurately reflect the actual usage of the NFS-mounted volumes used for archival purposes
Broadcom is aware of this known issue & there is no workaround for this issue.
The fix is planned with the next major release.