WD Elements 2TB USB 3.0 Portable Hard Drive for $89.99 shipped after coupon code KTQ129799. Here is a screenshot for reference. This portable USB drive does not require a separate power supply and is smaller than most of them, making it more convenient to carry around. USB 3.0 interface is compatible with USB 2.0 and able to transfer data significantly faster. Most places have it for about than $109.