First she should try copying a file to that external drive to make sure files can be written to it. If she can copy a file over, then the hard drive is working fine. Leo doesn't like Norton Backup as a solution, though. It, like a lot of backup software, backs everything up as a big "blob" and won't let her see the individual files on the external drive. Uncle Bic in the chatroom recommends Cobian Backup. It will backup the individual files which Carol can then see on the external drive.