What is the difference between USB 2.0 and USB 3.0 connector?

Speed — USB 2.0 offers a transfer rate of about 480 Mbps, whereas USB 3.0 offers a transfer rate of about 4,800 Mbps which is equal to about 5 GB. … Connector Wires — USB 2.0 has four connector wires, whereas USB 3.0 has nine, which increases speed and bandwidth.