Western Digital My Passport 2TB USB 3.0 Portable Drive for $99.99 shipped. Here is a screenshot for your 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. In addition, the USB 3.0 interface is backward-compatible with USB 2.0 and able to transfer data significantly faster by using USB 3.0. Most places have it for about $129.