I am trying to use my hard drive I have had for a couple years to back up some files on my computer, but the data I had stored on there already has disappeared. I previously had the hard drive connected to the Time Machine application, but have not used it in over a year when I received an error message trying to backup my computer using that application. I know the data I already had on there is still on the hard drive because nearly half of the space on the drive is used up, but when I plug the hard drive in to my computer and open it there are no files to be found. I want to back up the current files on my computer, but I don't want to risk losing what I already had on the hard drive, so is there any way I can find and access the old files again? I'll include my hardware information on here in case that helps to find a solution: 2006 MacBook Pro 15" Intel Core Duo Mac OS X 10.5.8 1TB Western Digital My Book: Studio Edition II Dual-drive Storage System with RAID Thanks for any help.