USB (Universal Serial Bus) is a standard interface for connecting external devices to computers. USB2.0 and USB3.0 are two different versions of USB standards, with the following differences:
1. Speed: The maximum transmission speed of USB2.0 is 480 Mbps (megabits per second), while the maximum transmission speed of USB3.0 is 5 Gbps (gigabits per second). Therefore, USB3.0 transfers data faster than USB2.0.
2. Cables: USB2.0 uses four wires (two data transmission wires, two power supply wires), while USB3.0 uses nine wires (four data transmission wires, five power supply and ground wires). These additional cables allow USB 3.0 to provide higher transmission speeds and more power supply.
3. Power consumption: USB2.0 consumes lower power during transmission, while USB3.0 requires more power to support faster transmission speeds.
4. Appearance: In appearance, USB3.0 has a blue interface with a 9-pin design; USB2.0 is usually a white or black interface with a 4-pin design.
5. Compatibility: USB3.0 devices can be compatible with USB2.0 interfaces, but the transmission speed will be limited to the maximum speed of USB2.0. USB2.0 is usually used to send videos, documents, pictures and other files, while USB3.0 is not limited by file size and can transfer larger files.
USB 3.0 is compatible with USB 2.0 devices, but when connected to a USB 2.0 device, the transfer speed will be limited to the maximum speed of USB 2.0. Therefore, if you want to take full advantage of the high-speed transmission capabilities of USB 3.0, at least keep the host (such as a computer) and the device (such as a hard drive) supporting USB 3.0 and use a USB 3.0 data cable.
