Type-c is a connection interface of USB interface, which can be inserted in both sides of the front and back. The size is about 8.3mm x 2.5mm, and it supports USB standard charging, data transmission and display output as well as other interfaces. 

USB 2.0 is a common PC interface, with four wires and two power sources, which can't be reversed. 

The type-c USB 3.0 port can read and write speeds of up to 800Mbps, and the reading speed of USB 2.0 port is only 480Mbps.

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