That's right. The installation creates a C: of 60GB and the remainder of the first disk to D: - which is what you have. Look in the Dashboard, Server Folders & Hard Drives, Hard Drives - you should see your 2nd 2TB disk waiting to be told to be used
for data storage or server backup. If not, RDP to yoir Desktop and check that it's showing up in Disk Management.
Phil P.S. If you find my comment helpful or if it answers your question, please mark it as such.