USB 2.0 ports are recommended for BASIC Stamp boards. On some computers, the internal USB hub will freeze when disconnecting a USB 2.0 device from a USB 3.0 port. This may cause all USB ports on the computer to become unresponsive, requiring a reboot of the computer to remedy the situation. System updates from your computer manufacturer may correct the problem.
USB 3.0 ports can sometimes be identified by a blue tab inside the socket.