i plugged a go pro hero 4 into my pc, it didn't show up so i assumed it was just the go pro. When i later plugged my phone in, nothing was shown in the file manager and no connection noise was made. I lated used an sd card reader, my pc detected that and the tone that plays when a usb device is plugged in but when i inserted the sd card, nothing happened. I assume it is just storage devices because my keyboard, headset and mouse still work.