z Local disk
Allows you to browse your drive using a standard folder structure.
z SD Card
Allows you to browse the files on your SD Card
z External Disk
With OTG features users can add other USB devices and select the file of
external USB device
Functions of keys:
z "+/-" key: to control the volume up/down;
z Wheel key: Briefly roll the wheel up or down to select the next or
previous track, or roll and hold the wheel to fast forward or rewind the
current track;
z Wheel key: briefly press the wheel key to enter the Music submenu;
z " " key: briefly press it to play or pause the current file, press and
hold the button to power the player off;
z Exit key: briefly press this button to return to the music library, or
press and hold the button to return to the main menu.