Re-adding Backed Up Files?

Ok, so my laptop pooed its pants and decided to break after numurous half successful attempts to fix it, as i had established it was a harddrive problem, i backed up my files onto 3 disks and system reset my laptop.I automatically backed them up, what i mean is i let the computer do it for me it scanned them and put them onto the disk and what not. So it got reset and i booted it back up did all the hoo haa and eventually got back to the main bit. it never explained to me how to re add all my backed up data and even though it recommends using disks whenever it mentions backing up data, when you look around the help pages all it talks about is internal backing up, so it gives you no clue of how to re-add all this data, which is very frustrating.It has all saved as .wim files, don't know why.