According to Wikipedia: "File Allocation Table (FAT) is a computer file system architecture now widely used on many computer systems and most memory cards, such as those used with digital cameras. FAT file system is commonly found on floppy disks, flash memory cards, digital cameras, and many other portable devices because of their relative simplicity. FAT was also commonly used on hard disks throughout the DOS and Windows 9x eras, but its use on hard drives has declined since the introduction of Windows XP, which primarily uses the newer NTFS." The traditional DOS file system types are FAT12 and FAT 16. With time goes on, there are FAT32 and NTFS as well.
You may Lose FAT Data Caused by:
FAT partition corruption and partition resizing
System or software malfunction
Incomplete or unsuccessful repartitioning of hard drive
FAT file system damaged
Accidental format, hard drive formatting
Boot sector corruption, unexpected shutdown
MBR (Master Boot Record) file damaged
Virus infection, power surges
Human errors, Windows operating system sabotage, bad section, etc.
When you inadvertently lose your data from FAT-based operating system on your Windows computer, you need to choose a useful FAT data recovery software to help you get out of the dilemma. FAT Recovery is a light-weight yet powerful solution that enables you to recover data from deleted, formatted, corrupted FAT partition, hard drive, external USB drive. It works well with FAT 12, FAT 16 and FAT 32. What's more, it empowers you to restore, backup partition table when your partitions was deleted, formatted, corrupted or lost. If you are Mac users, you can try Mac FAT Recovery as well.
Part I: How to Undeleted FAT, or Recover Deleted FAT partition in Windows?