USB 3.0 is a Universal Serial Bus (USB) standard, released in November 2008. Most new computers and devices being manufactured today support USB 3.0. USB 3.0 is often referred to as SuperSpeed USB.
Devices that adhere to the USB 3.0 standard can theoretically transmit data at a maximum rate of 5 Gbps, or 5,120 Mbps. This is in stark contrast to previous USB standards, like USB 2.0, that at best can only transmit data at 480 Mbps or USB 1.1 that tops out at 12 Mbps.
USB 3.2 is an updated version of USB 3.1 (SuperSpeed+) and is the latest USB standard. It increases this theoretical maximum speed to 20 Gbps (20,480 Mbps), while USB 3.1 comes in at a maximum speed of 10 Gbps (10,240 Mbps).
Note: Older USB devices, cables, and adapters may be physically compatible with USB 3.0 hardware but if you need the fastest possible data transmission rate, all devices must support USB 3.0.