It's a new 1TB SATA drive, that I formatted using Disk Management.
My real question is with the 'WNDOWSAPP' directory that was created during the formatting process. It will not allow me to view this directory or allow me to change the permissions. As a result, when I change settings to store new Apps on 'D', they still seem to end up on 'C' which is now basically full.
Did I do something wrong when I formatted the drive?