Also, take a look at downloading a copy of Wikipedia! You can get a full download with images for around 100GB (last I checked, which was about two years ago). It's great for if you ever think you'll need some technical info while away from live internet. I keep a copy on a hard drive that boots into linux, just in case (maybe I'll be on site with a customer and need some engineering notes - BAM taken care of!)
[0] https://archive.org/donate/
EDIT: I used XOWA, and I do not keep the wiki up to date, really. Note that the entire wiki history is huge, but a reasonably current snapshot is manageable (~100GB or so).