Why do computers always prompts USB unplug when phone connected to computers with data cable?

There may be many reasons for this situation, and troubleshoot according to the specific situation:

1. Interface problem: Since the practical data line connects to the computer, two interfaces are involved.

(1) computer USB interface: change a USB (such as the interface at the back of the case) and try again, or change a computer

(2) Mobile phone USB interface, change to another MI phone, or firmly plug in the interface

2. Data line problem: it is possible to change a data line.

3.SD card problem: If all the above have been done or often disconnected, it is suggested to back up the contents of the SD card, and then format the SD card in an attempt.