Nextar Digital MP3 Player - Manual (Page 18)

“Navigation” function
From play or pause mode: keep pressing the M button to enter the main
menu, press the ►►
or ◄◄ button to select the Navigation mode, repress
the M button to enter. The music and folder under the root directory
appears on the screen.
a. Select to play the music under root directory:
..... 1. You can press the V+ or V- button to find the root directory and press
the M button to confirm playing all the songs under this root directory
of a:/.