NTFS is a much more stable format of partion and is the newest. If a NTFS partion becomes corrupt, it can sometimes be recovered with special software. NTFS can also recognize more space on a Hard Drive and is a much more efficient and faster format to useFAT is a very old sort of format and goes all the way back to windows 95. It can only recognize a very small hard drives full space. If a FAT partion becomes corrupt then its next to impossible to recover it. A FAT partion has more of a chance of becoming corrupt if your computer crashes.