Tell us, if you can, the maker and model of your mobo. OR, if this is a already-made computer, what make and model? Then we can look up its details. It is normal that a case might have only one or two front panel USB sockets, but the mobo normally has SEVERAL more on the back, plus possibly some mobo headers to plug in more for mounting somewhere.Further, you may have BOTH USB2 and USB3.2 ports on your mobo, and they can operate at very different speeds, so which things you plug in where and how needs some thought.