I have an OWC Mercury Elite 7200 RPM USB 2+1.1 60 GB drive I am trying to use as a backup for my G4 iBook, 933, 640MB, AE, BT laptop. I cannot get Retrospect Express to backup to the drive...always says the drive is "busy". Any help would be greatly appreciated. I am a novice and have read the instructions and help section prior to posting and have not been successful in my attempts??????