Remember this. The apk and zip files always needs to have the double of GB to unzip
You need 20gb free to download and unzip the file (if you have at least a potato PC or laptop you can use it to unzip the file without using the phone space)
Once you unzip the file you can delete it. And the rest of GB free save at least 1 or 2gb for the future update
(Sorry if my English it's bad)