Is the system back up with the System Restore backup? In the System Volume Information folder.
If it's a ghost backup, just look in that folder. Gho file, this is the ghost backup.
If it is the restoration of the storm and so on, that is the last part of the hard disk of the hidden space, you can not see.
If you want to back up your files yourself, it's your own convenience. However, it is a good idea to back up the driver, the important file data to the last, or the penultimate partition. Because your first partition may be a system partition, there is the possibility of system crash, redo system, if you use like the storm, Pro Magic and other restore software, you must not put on the last partition, because they uninstall the last partition to delete.
It is safer to divide the hard disk into four partitions, first partition C: Installation system, about 10G, second partition D: Store daily documents, about 20G, last partition F: About 20G, storage System driver, software Installation source program backup (CD or CD drive sometimes unreliable), and important files, The data also has the history document the compression package, in the middle that section E: Any you like, the song, the movie, the game and so on all May.
Additional installation, preferably with Ghost to C: Make a backup, put in the last partition, spend 10 minutes to save you at least 1 hours of time, and then install a Restore wizard, in the installation of important software, software important upgrade debug after the new restore point, you can save a few later time.