Could someone explain to me how to create a RAID10 array with two 4TB drives? As soon as I select the software RAID, I get this warning:

Total storage size exceeded licensed storage capacity. Please purchase license key for bigger capacity.
Unless I am mistaken, RAID 10 is a STRIPE of MIRRORED drives, and therefore, you need twice the licensed capacity to create said RAID. Perhaps that restriction should be relaxed until AFTER the RAID array is created?