How to compare 2 volumes and list modified files?

Question

I have 2 hard-disk volumes(one is a backup image of the other), I want to compare the volumes and list all the modified files, so that the user can select the ones he/she wa

Answer 1

Assuming you're not comparing each file on the new volume to every file in the snapshot, that's the only way you can do it. How are you going to find which files aren't modified without looking at all of them?