How to open the file transfer mode of Mi Tu 4c watch?

1. Make sure the watch is fully charged and connected to the computer, and then open the setting application on the watch.

2. Find the watch or watch information in the settings, and click Enter.

3. Find the developer option or USB debugging option in the "About Observation" page, and click Enter to start USB debugging. At this time, the watch will enter the file transfer mode, and the storage device of the watch will pop up on the computer.