Fatsort (http://fatsort.sourceforge.net/) is a very useful tool to order your MP3s so you can listen in your MP3 hardware player.
Fatsort is command line tool that allow you to order your files in a USB stick. It’s usage is very simple:
1) First get the device location by typing “sudo mount”. There you should find something like “/dev/sdb1″.
2) Unmount this device: “sudo eject /dev/sdb1″
3) Apply the fatsort to that unmounted device: “sudo fatsort /dev/sdb1″
And it’s done 