I just helped my friend build an editing PC, with two storage devices. One is a 120gb ssd, and the other is the 4tb hard drive. The hard drive is not detected in windows though. I know it works because it shows that it is available in the BIOS and other boot menus. When I go to look at the Drives in computer, it only shows the 120gb. I don't understand what's wrong. It knows the drive is there, but I can't put anything on it.