Chosen Solution

The window reads ‘Full’ on my new media card.

@notbroken. I looked up my model on the Nikon website and found helpful information. However, I think I’ll take it to a local camera store for them to check it out. I was hoping it would be a quick fix, but it isn’t. It’s okay. I’m still a little exasperated, but the camera shop should be able to fix it, at a minimal cost. Hopefully. Thank you very much for trying to help.