FATSort is a C-based utility that sorts FAT12, FAT16, FAT32, and exFAT
partitions. It fully supports long file name entries and recursively sorts
directory structures by reading the file system’s boot sector.

The tool was originally developed to organize MP3 files on a hardware MP3
player that did not support automatic file sorting. Since no suitable utility
existed at the time, FATSort was written to fill that gap.