Hi, I am trying to use my 3TB WD green external as an internal drive as I am running out of room on my main hdd. Unit works fine when plugged in through usb, but when I connect it via sata it does not show up on my bios or in my computer. My 500 gb external is connected via sata and I have no problems using it as an internal. Any ideas as to why the 500gb works inside and the 3tb does not? They are both WD Green drives