Kiwix is Pretty Cool
A friend lives in Houston, where one regularly loses power due to hurricanes and the Annual Winter Storm. Not wanting to lose access to the internet in these trying times, she has downloaded the whole of Wikipedia onto her phone.
She did this with Kiwix, a program which compresses webpages and lets you view them online. Currently, Wikipedia comes out to 112 gigs with pictures and 43 without, but you can also download articles by topic (or one of several archives that claim to include the most important articles). There are also other archives, you can get other Wikimedia projects and Project Gutenberg. But there's also more niche stuff--like game wikis, Stack Exchange forums, and the Internet Encyclopedia of Philosophy. You can even download the i3 docs, which is kind if funny to me.
This is incredibly useful! I often find myself wanting to read things on road trips. But we're frequently out in The Boonies, where cell service is spotty or nonexistent. So, I went ahead and put 45,000 Wikipedia articles on my phone, along with a few other things. Given I don't have many apps on my phone and take selfies semi - annually, this was doable with plenty of space to spare.