There are three methods of Scripture distribution offline:
SD and micro-SD drives for exchange of digital copies by disk.
Bluetooth allows device to device distribution (phone to phone, computer to phone, phone to computer etc).
WiFi Offline distribution with devices such as LightStream, AirStash, Library Box, Pirate Box or Raspberry Pi allow transfer of files through a local wifi network.
Pirate Box software allows users who have a TP-Link MR3020 or a TP-Link MR3040 router, a flash drive, a computer with ethernet port and an ethernet cable to create a an anonymous offline mobile file-sharing and communications system. Total cost of the unit plus free software is about $35, however users must follow instructions to program the router with the Pirate Box software. You can view the instruction page here: http://piratebox.cc/openwrt:diy You can view a “how to” video here: https://www.youtube.com/watch?v=DwSh1zpOBVo
Raspberry Pi works on a similar principle however it is a bit more complicated and will need some ingenious housing for the circuit board once programmed and connected to a flash drive.
A Local Wireless Network using a router box set-up can allow offline, secure data transfer via a local website.