This is a USB 2.0 drive, with rectangular shape (Model: SDCZ36-064G-A11), and it seems sturdier and faster than the rounder model (Model: SDCZ60-064G-A11, which is one hundred bucks, the whole rounder range is to be avoided) from the same manufacturer. The 20GB drive in the same design is twenty bucks, the 16GB is nine bucks, and the 8GB is seven bucks. All these are very cheap.
This is advertised online, and the local B&M store may or may not have them, but you can always ask the local store to order them for you, it comes the next day and you pick it up.
Of course USB 3.0 drive are much faster, if you have a newer computer with USB 3.0 support, but they are very expensive, and for most USB uses speed does not matter anyway.