Whenever my phone is connected to my laptop, it won't let me change it so that it's in disk drive mode. It will only let me charge it. It always shows a loading screen whenever I exit out of an app and sometimes it won't even go to my home screen! It'll just show a black screen with the notification bar. Most of the time it'll reboot itself from there. It also won't let me take pictures - I can't even open the camera app! It'll just show the same black screen. And whenever I try to view the gallery, it says "An error was encountered on your sd card." I've tried rebooting it manually and doing a factory reset but nothing works.