I too format the card right away. I got a card @ Costco I need to take back. It doesn't hold the photos

I've lost a lot of good ones... Makes me so mad. I reformatted each time with no luck.
We took 490 photos at an airshow. I can see them on the camera but they will not download to the computer... says all the files are corrupted. This is the third time... 80 photos came out, 410 did not.

We lost some really fun photos