Lost Photos? I took photos that never showed up on my 8GB card.

There are certain photos that I know I took & yet I could not locate them on my memory card. Does anyone have they foggiest idea what could have happened to them?

Well, you may want to look in your internal memory. It's possible that your card's write protect tab was inadvertently engaged and it just didn't write to it. It may also be that your card became corrupted or that the camera is having difficulty reading sectors of the card - this is a sign of failure. I would use a file recovery utility like F-Recovery or Zero Assumption Recovery to see if you can get them that way. Once you have them off, chuck the card or try reformatting it. But if the card is showing signs of failure once, it will do so again. And they're cheaper now than they've ever been. So replace it. in fact, get more than one so should it happen again, you can simply swap it out for a healthy one until you can get home and recover it.

Lastly, cameras are terrible for file reading or management. Use a USB card reader to read and transfer your images, rather than the camera connection to the PC itself. It's much better than dealing with connectivity issues and a camera that simply isn't really designed to properly read like a computer drive.