bluezzzzz wrote:
I had that same problem with a couple of SD cards, where that little plastic divider strip had broken loose and was preventing proper contact.
I ended up snipping off the offending plastic with a pair of nail clippers, and everything has been fine since.
There is nothing out of place I used a magnifying glass to check it out. The failure happed while in use in the camera. It isn’t the camera either all was well with a different SD card.,The failed one is one I have had for a couple of years. It appears it just plain fail.