Fluffy Cat, 04/05/20 10:40:
Kiwix was what I tried aswell but it has a 37 GB download which I was trying to avoid.
Have you tried wikipedia_en_all_mini_2020-04.zim, which is only 11 GB, less than the latest dump?
The most suitable way to save on size depends on what your purposes and resources are. For instance, we used to have lighter downloads without the index, which saved bandwidth, but eventually required the same amount of disk space and considerably more CPU usage (at least initially).
Federico