This is a program for copying files and folders in alphabetical order. Windows rarely copies files or folders in the order you would expect. And normally this isn't a problem. But, on a flash-based MP3 player, the device may very well play the songs in the order they were copied, instead of alphabetically, or by track info.
This program allows you to specify a source path (or paths), a destination path, and a file-type to copy. Then, either click COPY FILES and wait patiently, or click WRITE BAT, which will write out a .BAT file with all of the MKDIR commands, COPY commands, and DEL commands in it for reviewing/editing/running. The program has an option to overwrite existing files, and an option to remove files from the destination which no longer exist in the source.