Dell Home offers the Western Digital Elements 500GB USB 2.0 Portable External Hard Drive, model no. WDBAAR5000ABK-NESN, for $59.99 with free shipping. This 500 GB drive comes with a USB 2.0 interface which does not require any power adapter as it is powered directly through the USB cable. Moreover, this preformatted external hard drive is designed for use with windows based computers. If you are looking for simple and reliable add-on hard drive storage, the WD Elements Portable External Hard Drive is the ideal choice for you.