Form Data dump to USB

When internet is not available, it would be great to have single click data download to a USB drive plugged in to the android device

**Only field team lead has access to Satellite modem. Needs to get data off fifty devices and then send up to an aggregate server. They put USB drive in to each device in turn, dumping all data to the USB drive. The app is smart enough to organise the folder so that data from same forms is aggregated across devices. i.e. the field supervisor only has to work with one folder of instances from all devices. **