I've tried everything I can think of... never had an issue until recently. All firmware and app version up to date. Tried switching cables. Turn USB to media transfer. App works for a few seconds or a few minutes (varies), then "disconnected." I believe it is an issue with the phone and the USB settings, but every time I set to media it only works for a minute then disconnects. I have played with usb debugging, developer mode and changing usb default setting, but still won't work. Any thoughts welcomed!