Day one of downloading the Kiwix copy of all of Wikipedia did not go as hoped. The file is 40GB in size.
When I started, Chrome reported that it would take 1 or 2 days to complete with my internet connection. So, I let it run over-night, hoping that it might be a bit faster in the wee hours of the morning. Unfortunately, it was only 80% done when I had to unplug to take my computer to work.
When I arrived at work, I found that Chrome had canceled the download. Some googling revealed that Chrome can not resume a cancelled download, but Firefox can. So, I will try again with Firefox tonight.