We often use USB2.0 and USB3.0, and we don't know what the difference is between the two. I'll explain to you today:

USB 2.0 is the standard of USB interface released in 2000. The maximum transmission speed of the theory is 480Mbps (about 60MB/s), the interface has four lines (the MicroUSB and MiniUSB are 5 lines), and the maximum output current is 0.5a. USB 2.0 is the most common version of USB today. Almost all computers have USB 2.0 ports. Most USB devices also support USB 2.0.USB 3.0 is the standard of USB interface released in 2008. The maximum transmission speed of the theory is 5Gbps (about 500MB/s), the interface has nine lines (the MicroUSB and MiniUSB are 10 wires), and the maximum output current is 1A. 

USB 3.0 is now widely available, and most of the computers produced in recent years have USB 3.0 interfaces, while USB 3.0 ports are also used in many USB drives and other devices. The USB 3.0 feature is that the plastic structure inside the plug and socket is blue, while the low-version USB port is mostly black or white. 

USB 3.0 is designed with a downward compatibility problem. USB 2.0 devices can be plugged into USB 3.0 interfaces, while USB 3.0 devices can also be plugged into USB 2.0 ports. Simply put, as long as the plug is physically compatible (it can be plugged in), it can be used.

To sum up, there are three differences:

 1. The number of PIN is different, USB2.0 is 4PIN, USB3.0 is 9PIN. 

2. The maximum output is different, USB2.0 is 0.5A, USB3.0 is 1A. 

3. Compatibility is different, USB2.0 is not compatible with USB3.0, USB3.0 is compatible with USB2.0.

Japhy