Fuji Finepix 40i - Read error

Question

I have had this camera for 5 years and it has been very reliable up to now. I can take pictures but when I view them on screen it comes up with a 'read error' and the light flashes red. This seems to have occurred since I downloaded all pictures on two separate discs on to my computer. I have reformatted both discs but this has not made any difference the same problem occurs. Can you suggest any solution? Thanks in anticipation