Dear Thelma et al,
You probably withdrew your storage device before it had finished transferring material. Put it back into THE LAST COMPUTER YOU USE iT ON - after about 30 seconds, ask the computer if it is safe to remove the device by clicking the green arrow in the sys tray = bottom right hand side. Do this three or four times - DO NOT RUSH THE PROCEDURE. It worked for me. Good luck.
Brian Murray.
Brian Murray, June 2006