USB Cable for Western Digital My Passport Essential 320 GB USB 2.0

I am looking for a replacement cable for the Western Digital My Passport Essential 320 GB USB 2.0 Portable Hard Drive WDME3200TN, which I purchased in 2009. Is it a mini USB or a micro USB cable? How many pins? I am looking on Monoprice, at the moment, but I am not sure which cable to buy.

Any help would be appreciated.

Thank you.

It should be a mini usb cable. try contacting wd tech support I believe that they can sell that to you over the phone.