Luckily I found many inexpensive hardware kits to choose from so I placed an order. (jerseygirlinthesouth.com)
Then put this tutorial for inexpensive hardware to work for you too. (morningchores.com)
It's described on the main project website as a «portable digital file distribution tool based on inexpensive hardware that enables delivery of educational, healthcare, and other vital information to individuals off the grid.» (slaw.ca)