In my build, I have an SSD as my boot drive running Windows 7 and a 2TB HDD as my storage drive. I bought a 3TB external HDD to use as my backup drive, and ideally I would like an exact image of both my hard drives to be on the backup disk. Is there a program that will do this for me? Also, it would be great if I could ask it to update the backup it has already made, rather than continually re-cloning the disks and deleting the previous version. Thanks for any help.