My Book: Suddenly not recognized

and what about the 300 plus gigs of backup on this drive. I have a different problem.  My computer and my laptop and my office computer recognizes My Book for about 5 seconds and then dosen’t for 5 seconds then does etc etc etc.  I can;t get all my backup files from it.  You will say just replace it.  WTH.  If this is the way you treat your WD customers I will never buy a WD product again.