Camera Flash Adapters It Does What Is Says It Does. Problem With Nikon Camera Reading SD Card?

Problem with Nikon Camera reading SD Card? - camera flash adapters it does what is says it does.

My Nikon D50 not recognized, or not to use my SD card .... During the past week, but decided this week, no. At the top of the camera on the LED display CHA shows. If I have a photo from my camera and quietly focus on the flash but not fair, open. I still have plenty of space in it.

I tried a different SD card and it works well ... The only difference between the card and mine is that I am on a MicroSD adapter that slides into a bin. But like I said ... its worked before, why not now?