If you double tap your xbox button and then press Y it will take a snapshot...you can then find them in your GAME DVR app
My friend got the 100 pound cat.. WARNING LOOKING AT THIS PICTURE MAY INCREASE THE WEIGHT OF YOUR PHONE
Go to the Xbox live website and login with your regular details and your snapshots will be there. Download them to your pc and upload them as required.
to clear the cache on your xbox one console , when the console is turned on , press the power button and keep your finger over the button for about 30 seconds until you hear no more noise from inside the xbox , then when you turn it back on , you should get the green screen and fresh boot up