exFAT heading towards Open Invention Network's Linux System Definition Microsoft has published the technical specification for exFAT, a file system widely used for removable storage devices.exFAT is widely used for high capacity SD cards in cameras exFAT stands for Extended File Allocation Table and is widely used for things like memory cards. It is the most recent iteration of Microsoft's FAT series, a simple file system that is lightweight but lacks the resiliency and security of file systems like NTFS.The original FAT was used by DOS in the late 1970s. It was expanded to 8-bit, 16-bit, and then to FAT32,...