Someone here wants a backup. My preferred method is send the data to a tablet for display. If you want redundancy, make two units and send both data to the same tablet or send all data to more than one tablet. If you organize your data into multiple pages, you can have one tablet displaying one set of the data and another displaying another set. If one tablet dies, no big deal, just flip through all the pages on the remaining tablet(s). The whole setup shouldn't cost you more than $500.