I've found the way to display them in a particular order on a USB drive is to put a number at the beginning of the file name. Careful not to use 1,2,3,4,5,6,7,8,9,10, etc. Rather use 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, etc. If there are more than a 99 songs, then use a three digit number; 001, 002, etc.