Card Error Message

[duffer2usa]

I attempted to download a picture from my 7hi to my computer via a card reader. I got a message stating the card needs to be formatted. It was not understandable because the card was working in the camera and had been working in the card reader. But I formatted the card in the camera only to receive the same error message. Stupidly I attempted to format via the computer and now my card won't work at all. Is the card wasted or is there some way to reformat the card? I can't in the 7hi.
Thanks....Jerry