Need more details, what are you trying to play them on, in what format are these files, did this work before, how are you putting the files on the card? Are you placing them in the correct directories for the media player to see them? What media player are you using?
Need more details, what are you trying to play them on, in what format are these files, did this work before, how are you putting the files on the card? Are you placing them in the correct directories for the media player to see them? What media player are you using?