I have the 15" MBP and use an external HD for back up. I just purchased the new 13" MBP. Is it possible to take the external HD used with the 15", connect it to the 13" and pull some pictures and other things off and put them on the 13". I tried but I was not successful so I don't know if it's not possible or I just didn't know how. I don't want to restore the whole thing, just selected items.