Western Digital Elements 640GB 2.5" USB Portable Hard Drive for $89.99 Shipped
Western Digital Elements 640GB 2.5" USB Portable Hard Drive for $89.99 shipped after promo code EMCMNLW23. Here is a screenshot for your reference. It does not require a separate power supply and is smaller than most external drives, making it more convenient to carry around. Most places have it for about $119.
