The difference between USB 2.0 and USB 3.0 is their speeds. A USB 2.0 hub transfers data at 480 Megabits per second, while a USB 3.0 hub opens the floodgates for 5 Gigabits per second—or more than 10 times the speed. USB 2.0 hubs are excellent for use with peripherals like scanners or printers, or for transferring smaller data files. If you’re working with video or very large photos, USB 3.0 makes a lot more sense. USB 3.0 hubs are compatible with USB 2.0 devices, but you’ll only get the 480Mbps speeds. Also, keep in mind, most hubs with USB 3.0 cost more.