Motorola E815 / E816 Hollywood

I tried putting my TF card into my 815, hoping it would play all my V710 media. It didn't recognize it and asked to format it. I said no so I wouldnt lose what I had. I connected the card to the computer (through my camera) as usual so I could put the **** I had on my computer. It didn't show up so I figure I lost it. Although pissed, I accept this fact and put it back in the 815. When I try to format it, it says format failed, try again? What should I do?