i realised last night when connecting my device that you can use adb shell without bootinging the device.
when you connect the device to the pc and the charging symbol comes on, wait for about 30seconds and you will hear a "dun-dun" in windows. try adb shell and it works.
the op may not be familiar with adb but it means that he could try and pull from the device
EDIT: infact i can adb remount, adb shell and su in this area.
Samsung Galaxy S3 (playing with roms still)