I run win 10 from upgrade. I have been using 11 hard drives. 9 are 1tb or more and 2 are 250gb or less. I took of my 2 small drives and put a 3tb drive instaed. does not show in the computer management on the control panel. I have tried it in a slide in extarnal drive on usb3 but still nothing. PLaese help!!!!! I had this problem with a 2tb drive but I move the usb plug until it worked.