I use a memory stick and am very happy with it, If I recall correctly you have to put your songs in folders that contain up to (250) songs each, double check that number in your owners manual. You can then play your music either by folder or completely random, I have about 1200 +/- songs on my memory stick and add more whenever I get something I like. Another tip is to rip the songs at the highest bitrate?/ quality possible for best results. Finally a small piece of Velcro applied to the stick and the inside of the saddlebag will hold the stick in place.