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I always format my cards in my laptop.
Has the little "lock" feature on the SD card been moved to Lock? that could be your problem
I also format the card with the camera. I also have two cards for each camera, name labeled so I know which one goes where, which reduces the reformatting I'd do otherwise.One of my old cams would only work with 3 manufactures cards. Since then, I've stuck to San Disk and had almost no problems. ....... My Bushnell did record about 100 vids last summer that I couldn't open on my laptop. Tech support suggested reformatting the card every time I put it in the cam. No similar problems since that one.