Got a new xps 8900 and immediately swapped out the 1tb had with a Evo 850 512g sad and everything works great. Tried to add a 6tb WD black but win10 does not see it in disk manager. Shows up in bios. Tried booting in non UEFi mode, unsecure but nothing's showing the WD. Got a external sata usb HD dock and through the dock, Windows sees the HD. Able to format. Connect back to MB sata port directly and again the HD does not show up. Updated all drivers on Dell. Any ideas?