Initialize Data Storage Disk
By default, AWS doesn’t automatically initialize a second storage drive (i.e., the 300GB D drive). Perform these steps to initialize the data drive:
Connect to your EC2 instance using Remote Desktop Connection.
Open PowerShell window (press the Windows key and type powershell). Select “Windows PowerShell” in the context menu.
Initialize the second disk.
Create a new partition on the second disk.
Next (Stop your EC2 Instance)>