I have just bought an ASUS desktop PC and find that there are two drives. One is the usual Windows "C" drive and the other is "D data" drive. My problem is that the "C" drive is very small and all my storage space is on the "D data" drive which has 2 TB. Everything seems to be saving to the "Windows C" drive how can I get the "D drive to become the main drive for everything. Can anyone help please??