My screen was totally smashed and black and this is how I accessed mine. Connected to PC via USB. e I could not power the phone down as I had no screen so I held the power and volume up button. The phone restarted with a blue light in the top left rather then a red one. I then held the power button again and the phone appeared to reset again this time back on the red light. I then pressed and held the camera button which would usually activate the camera in lock mode. My computer now re-recognised the device via usb and I was able to access the internal memory. Worked for me but may have been a total fluke.
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