I'm new to this but back-up means take a copy. So if you have any changes they will be incorporated into your back-up. Have you tried the following. Right-click on the file and choose: "send to". You should be able to choose: "maxtor (F)" to copy the files you want saved onto your external drive. Better still, create a folder on the Maxtor and copy and paste the files into it. Try this out with test files to make sure you don't lose anything.