I'm thinking this may have been discussed before. If someone can suggest some key words to search. I got too much to sort through with the stuff I tried. I did a full backup. Then I did a Windows Update. Then I did an incremental. It took three hours. I thought there is no way there should take that long so as a test as soon as that incremental finished I started another one. I did nothing on the computer during the first incremental yet the estimate for the second one is two hours. What is up with that? I'm backing up to a brand new 500GB USB external drive. Any help on this?