Pressing down on the shutter will not shut down the YI 4K Action Camera. Check settings to see if "In Housing Mode" is turned on. Related articles While using the USB cable to connect the YI 4K Action Camera to a PC, why can't the camera be used to take pictures, videos, and pair? What do I do if the YI 4K Action Camera crashes? What are the requirements for my microSD card?(YI 4K Action Camera)