Searching has zero fault tolerance I use a complete 2015 English Wikipedia that takes nearly 50 GB on an SD card. It is a very important resource in my life  which is luckily often offline. The drawback is the unforgiving search. Case sensitive after the first letter. Article names consisting of more than one word are not shown unless the words are typed in order. The exact spelling of the article name has to be known or guessed by trial and error  sometimes unsuccessfully. And there is no searching of the article contents.
April 25 2016