If the file order is sort by name before you copying them into the
player, they would be right order.
If your music is not sort by the right number, use the application
“Renamer” to sort your music files by number. Download Renamer
on the website (http://renamer.en.softonic.com/), and then
choose the item “Add folders” or “Add files” to add your music into
list. (For more details, please kindly check the link).
Put your music into your MP3 player and press play key to enter
Folder to check it.