iSCSI size limit

Using a My Cloud EX4100 with the latest firmware factory populated with 4 x 4TB drives. Why am I limited to 8TB on an iSCSI volume? I have 3.81 TB being wasted on the NAS due to this limitation.

It would be best to contact WD Support about this. You can do so over the phone or via E-mail.

Please let the WD community know of any solutions.