Some virtual machines have external mount points. These external mount points contribute to the Guest File System | utilization under metrics.
Need to exclude the external mount points and just get the utilization of the system from the disks that are allocated.
Environment
Aria Operations 8.18.x
Resolution
On the vCenter adapter settings, which host those target virtual machines, edit the settings.
Go to Advanced settings, search for the field "Deactivate collecting Guest File Systems with names containing", which will deactivate collecting guest file systems with names containing a mount partition.
Save the adapter instance.
Review Configuration|Hardware|Disk Space (GB) metrics for VMs for that target object.