If you want them to play in a certain order then name them with only 8 characters including a 3 digit number at the start for the order of play eg: 001TRACK 002TRACK And if your mp3 player supports alubums then you can put files from different albums into folders and name them like the files eg: 001ALBUM 002ALBUM And you'll end up with a structure like this: 001ALBUM -->001TRACK 002TRACK 002ALBUM -->001TRACK 002TRACK NOTE: You can replace the ALBUM or TRACK after the 3 digits to any 5 letters you want.