Tip for people working on sound mixes (meaning shuttling your USB drive between your PC and the PinSound board) - plug in a USB extension cable and route it down through the cab so you can access it through the coin door.
I dropped one in and have noticed no lag, and you can certainly yank it out once your mix is set up.
Seems like an obvious thing to do, but it took me a couple dozen times of back-forth before I finally thought to put one in there, even with the USB cable from the LED OCD already running that same path and staring me in the face.