Your "U" drive is the most important drive on your computer. The "U" drive is a network drives that handles all of your files. The only concept is that in order for your "U" drive to be a back up it has to have all of the files copied over to it. It CAN NOT self engage a copy files session. Your "U" drive should not have more then 50 mb of information on it unless you are copying your files over due to a reformation of your "C" drive. Your "U" drive should hold your"html" folder if you have a website, it should also hold any other miscellaneous information or files. Please do not keep executable files in your "U" drive, it takes up too much space, and they will randomly be deleted.