After you create your virtual disks, below the Virtual Disk Management heading you can see:
the total number of virtual disks (in this example, 150 Virtual Disks)
the Provisioned Size (in this example, 80.0 TB), which is the total size of all current virtual disks
For S3 buckets, the Provisioned Size is displayed as 0.
You can organize the list of virtual disks by filtering the list or by customizing the banner.