Hello and welcome t the WD community.
I would like to know if the unit you are using is connected directly to the computer or to a USB hub. In case the drive is connected to a USB hub trey and connect it to a USB port that is on your computer.
If you are connecting the unit directly to the computer then i would recommend contacting support by following this link:
http://support.wdc.com/country/index.asp?lang=en%22
I hopes this helps you out
