12. Document management (supply line inserted OTG interface)
12.1 click keyboard on the "folder" key to enter the "Explorer", then you
You can copy, cut, paste files
12.2 Connected to the computer
Keyboard click the "Settings" button to enter the "the setting
interface" - "USB" -"Connect to PC" and "Developer Option"
USB debugging must be checked on
13. System Restore
13.1 System Restore Settings: When the player system problems,
you can select the System Restore Settings
13.2 System setup instructions: Click the Keyboard "Settings" button,
enter "set interface" - "backup and Reset Into the following interface:
