Like Mac OS X’s backup utility “Time Machine”, Windows 8 has a built-in back up tool called “File History” that scans your system for personal file changes (personal files stored in Libraries, Desktop, Favorites, and Contacts folders, etc) and back them up on an external storage device without any user intervention at scheduled intervals. As this is an important layer of data protection, this new feature will definitely give a big boost to the Windows 8 operating system.