I took a video today using the video option in my Pentax digital camera. Neither the camera nor the computer show any files (hidden files included) on the SD card. The properties page of the SD card, though, shows 45% used space. How can I access my video? I've previously shot videos and seen them without problems and have since taken other videos and can see them. I just can't access the one I'm missing, and I know it's there because of the used space.