I perform a daily differential backup Images on my 2 hard drives (to a 3rd hard drive) using True Image Home V11. On my C (Windows) drive, the size of the differential backup only increases by 50 to 200 MB per day. The Differential backup on my D-drive, used for data and My Documents, increases in size by 1 GB or so each day. With very few exceptions, I'm not changing anything! I doubt there is 50 MB of files that change, in fact would expect more to change on my C drive. And if it's due to fragmentation (as I'm using an Image), it would be much greater on D. How do I find out what files are being changed, and added to, the daily differential backup on D? I've restored complete drives, but not usually individual files? Is there some way I can determine what new files are included in the backup? Most of the files haven't been changed since the original (full) backup, yet when I choose any date, I see files to select that haven't changed at all?