You need two flash cards. That way, when you take one out, you can replace it immediately with another one. She may ber crazy, but she's smart enough to figure out when the card isn't in the camera if she's watching you. Surprise her by putting your extra card in the camera when she thinks you are downloading the other one. We had some folks trespassing on our property to fish. They didn't know about the game camera, but we did and we had a card in it at all times. We caught them fishing one day (unscheduled visit home from work) and the fact that we had the video evidence has kept them away. Our neighbor is in his 80's and retired and lets us know if we have "company" when we are not home.