Nikon D300 Memory Card Full and Empty?

Well i have a nikon D300 and when i put a memory card in it blinks "Full" and it says it has 0 pictures they both blink at the same time can someone tell me how to fix or how to reset the camera or something!

Did you format the card in the camera? Time to read the manual.

How long have you had your camera and how much experience do you have using a fully adjustable camera.

This is basic stuff.

You filled your card and need to remove it from your camera and put another, freshly formatted memory card in you camera.

Next copy all the images from your memory card using a card reader and your file manager. Once they are safely on your camera, format the card, so it is ready to be used again.

I'm surprised you have never filled your card and don't have four or five spare cards.

I'm having the same issue and YES card has been formatted in camera (I've tried multiple cards). I've also updated the firmware as another article suggests. Anyone else?