Hi, my husband recently lost control of his Galaxy Note 5 after receiving the Nougat update. He's lost almost all his media, the phone keeps restarting in the middle of calls or tasks, can't access 90% of apps, home key brings up the camera which is actually just a black screen, the power button hardly works, and every time the phone reboots it is coming up with more storage space so something else is being deleted but we don't know what. Does anyone know how to fix it without having to do a factory reset? I'm guessing all the photos and videos are lost unless he backed them up?