I have a user that has a 9630. He was using the USB to charge his phone and transfer some photos from his phone. When he hooked it up and went to the E:/ drive that was listed in his directory, it linked him to a network drive on my server. I tried it with my phone and it would not connect.
He does not have mass storage turned on, but it does prompt him when he connects.
The directory on the server that he connected to is not one that is accessible to most users by default. I just don't know how it is mapping itself to the directory.