exFAT is not a file type. It is a file system of the FAT family.
FAT comes from file allocation table and originated with the early
FAT12 file system used on floppies, then to FAT16, and with WIndows
98 OSR2 added the FAT32 file system. The extended FAT file system,
called exFAT for short is the latest and was made available for the
desktop with Vista SP1 in 2008.