ntfs

NT File System (NTFS) (commonly called New Technology File System) is a proprietary journaling file system developed by Microsoft in the 1990s.
It was developed to overcome scalability, security and other limitations with FAT. NTFS adds several features that FAT and HPFS lack, including: access control lists (ACLs); filesystem encryption; transparent compression; sparse files; file system journaling and volume shadow copy, a feature that allows backups of a system while in use.
Starting with Windows NT 3.1, it is the default file system of the Windows NT family superseding the File Allocation Table (FAT) file system. NTFS read/write support is available on Linux and BSD using NTFS3 in Linux and NTFS-3G in both Linux and BSD.
NTFS uses several files hidden from the user to store metadata about other files stored on the drive which can help improve speed and performance when reading data.
NTFS was slated to be replaced by WinFS, one of the anchor features of the Longhorn platform, however WinFS was cancelled after Microsoft was unable to resolve performance problems with the filesystem.

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