problems with mp4 help please
 

hi everyone i just bought my girlfriend a mp4 player its a nano knock off made by max west board id is mxd-n4gs-4gd i think its whats on the back of it under the made in china sticker. firmware 9.5.54

so heres whats going on we'll format it put on here music it will work for a little while and then she gets a disk error and i have to reformat it again and put music back on it for it just to mess up thesame day and i was wondering for anyone knows anythin i can do to fix this. just spend 60 bucks for it