D. The media card reader connector (F_USB) on a motherboard appears as a connector with two rows of four pins. If it isn’t present on the motherboard, then the motherboard doesn’t support the type of device you’re trying to install. Solution D. The media card reader connector (F_USB) on a motherboard appears as a connector with two rows of four pins. If it isn’t present on the motherboard, then the motherboard doesn’t support the type of device you’re trying to install..