Moving on from the issues at hand, I have a Nikon D750. Not my first camera mind you. Always have used SanDisk SD cards. This camera uses the smaller in physical size disc. I've had several discs go bad in less than a year of use. Fortunately it informed me of this before I began shooting so no lost pic's so far. Has anyone else had similar experiences. SanDisk has always been reliable.

Another fun activity is blowing bubbles at a campfire. Play with open shutter too. You'll be amazed.