I am trying to copy a 4GB file to my SD card on my Note 3 and I keep getting this message "Device has either stopped responding or has been disconnected" after about 3 minutes or so and the only option is to stop the transfer. I have tried thrice. So I tried with my iPhone 4S and it copied this file without any issues AT ALL. Why can't I transfer this file to my Note 3? I am using the connection via MTP. Why is the "Media device option" grayed out??