The speed of copying files by connecting a mobile phone to a computer is very slow.

The USB port version of mobile phone will affect the transmission rate, and the interface of computer will also affect the transmission rate.

The theoretical rate of USB 1. 1 is 12Mbps, that is,1.5 MB/s.

The theoretical rate of USB2.0 is 480Mbps, which is 60 MB/s.

Even so, computers still distinguish between high-speed USB interfaces and ordinary USB interfaces (usually high-speed interfaces are behind the chassis).

Some machines (such as Blackberries) use the USB 1. 1 interface, and it is very slow to connect to a computer to transmit data.

But now many mobile phones use USB2.0 interface, and connecting computers to transmit data is many times faster than USB 1. 1.

(The picture shows USB 1. 1, and the picture is from the network, so delete it. )

(The picture shows USB2.0, image source network, intrusion and deletion)