M3 suddenly lost it's music file...and keep erasing music file

hello all...i need help....i've been use m3 almost 6 month and never have a problem...but suddenly my m3 lost all the music file....and the worst part is every time i try to put in a new music file my m3 seems keep delete the file....when i try browser in the m3 i cant find my music file, instead it fileed with some file with chinese language and folder VIDEO MUSIC LIBRARY ETC,

please anyone help me....

Format your player. Push and hold the play button and forward button at once for 10 sec.