You can put a 5.25" USB 3.0 Front Panel in one of the slots in front of your pc (slot where you put dvd drives in). Looks like your case has 2 of those slots so you can have bunch of usb 3.0's if you wanted. They cost anywhere from £10 to £50 or so.
They look like this - https://d284x0ytlho6sy.cloudfront.net/images/400/AB93966.jpg