USB 2.0 is a Universal Serial Bus (USB) standard. Almost all devices with USB capabilities, and nearly all USB cables, support at least USB 2.0 (often called Hi-Speed USB).Devices that adhere to this USB standard have the ability to transmit data at a maximum speed of 480 Mbps. This is faster than the older USB 1.1 standard and much slower than the newer USB4 standard.USB 1.1 was released in August 1998, USB 2.0 in April 2000, USB 3.0 in November 2008, and USB4 in August 2019.USB 2.0 ConnectorsUSB Type A: These connectors are technically called USB 2.0 Standard-A and are the perfectly rectangular USB connectors you'll find on most non-mobile devices. USB 2.0 Type A connectors are physically compatible with those from USB 3.0 and USB 1.1.USB Type B: These connectors are technically called USB 2.0 Standard-B and are square except for a small notch on top. USB 2.0 Type B plugs are physically compatible with USB 3.0 and USB 1.1 Type B receptacles, but USB 3.0 Type B plugs aren't backward compatible with USB 2.0 Type B receptacles.USB Micro-A: These connectors, especially the plugs, look like miniature versions of USB 2.0 Type A connectors. USB 2.0 Micro-A plugs are compatible with both USB 2.0 Micro-AB receptacles and USB 3.0 Micro-AB receptacles. However, newer USB 3.0 Micro-A plugs won't fit in USB 2.0 Micro-AB receptacles.USB Micro-B: These connectors are small and rectangular, but two corners on one side are slanted instead of square. USB 2.0 Micro-B plugs are compatible with four receptacles: both USB 2.0 and USB 3.0 Micro-B and Micro-AB receptacles. Newer USB 3.0 Micro-B plugs aren't backward compatible with either USB 2.0 Micro receptacle.USB Mini-A: These connectors are small and mostly rectangular with one very rounded side. USB 2.0 Mini-A plugs are only compatible with USB 2.0 Mini-AB receptacles.USB Mini-B: These connectors are small and mostly rectangular with noticeable indentations on the short sides. USB 2.0 Mini-B plugs are compatible with USB 2.0 Mini-B and USB 2.0 Mini-AB receptacles.