Hi
NTFS is a file system for formatting computer hard disks so they can store information. NTFS provides several improvements over earlier file allocation table (FAT) file systems, including file and folder permissions, encryption, and file compression.
For more information about NTFS, please refer to the following site:
http://en.wikipedia.org/wiki/NTFS
Please Note: Since the website is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.
Hope it helps.
Tim Quan - MSFT