We have Android tablets in lockdown (Soti Surf, Gallery, Camera, and Soti Settings are the only apps used) and have allowed USB access to the sdcard to pull pictures or videos by turning on USB sharing and USB Debugging allowed. We just want to keep the setting of transfering photos only (gives access to DCIM and Pictures folder). Every time the device is rebooted it switches back to the default of showing all the folders in the sdcard (when you plug it into a pc to pull data).
Thanks