BACK UP YOUR DATA! AND BACK UP YOUR BACKUP "Backing up" means making a copy of your most important files; this can then be used if the original is lost or damaged. I remember a young mother standing in my shop because her hard drive had failed and all of her childs pictures were on that single drive..WE both cried. They were irreplaceable. There was nothing I could do to help as the drive was beyond repair. This can happen to anyone's computer. In my last column we explore