Operation method
Open the phone, find the phone settings, click and enter, as shown in the figure.
Enter the setting interface, find more settings, click and enter, as shown in the figure.
Enter the More Settings interface, find the OTG and open it, as shown in the figure.
After the OTG is turned on, restart the phone, and then insert the USB flash drive into the phone to operate the USB flash drive memory, as shown in the figure.