I have a old 80 GB external hard disk which is currently giving a write protection error when I try to move data from the drive. I had not set this options. I had just copied some data form a windows vista computer and now I am trying to paste the data in windows xp. But the hard disk is giving error of windows disc is write protected. Now I cannot move file neither I can format the hard disk to remove this error. What should I do here right now.