We have done some additional research and it seems that in some cases, it is necessary to put the device in "Mass Storage" mode instead of "MTP autodetect" mode. Maybe this solves your problem so it is really worth trying.

To change to Mass Storage:
  1. Bring up the volume screen on the GPS.
  2. On the upper right hand corner. Press your finger on screen and hold for approximately 10 seconds.
  3. Shortly you will see the developers screen.
  4. Select "Configuration and Settings".
  5. Find "MTP Settings" and touch it.
  6. It will show 3 selections. MTP Auto Detect, Mass Storage and Mass Storage Single Session.
  7. Touch Mass Storage as your selection.
  8. Now select save and restart your device.
  9. Close the Connector and try to export again.Good luck and let me know if it does not work.