I bought this new with my Nicon camera. I was thrilled with the price, because SD cards have really gone down in price. My last one, a 1GB was nearly $50! But, when I first put it in I got a error "This card cannot be used." I took it out and reinserted it and it worked fine. I decided to leave it in the camera and use the cord to download. Then when I decided to take it to a special function - one of those "once in a lifetime" events, there was the dumb error again! So I took the card to Walmart for them to see if it worked in another camera. They said it was fine, so I figured my camera had failed. But, later when I got home, it worked fine once again. I'm going on a cruise in a few weeks, so I'm going to have to buy another SD card - this time a Sandisk - so I won't ruin my vacation.