u/Justice_aa

I have been testing the open source compression utility CompactGUI, which is simply a UI for the native windows compact.exe file compression utility. 

I used it to compress my mods/terrains folder.  I started with 786GB and ended with 532GB using LZX compression.  I test the load time with the Iraq map and only noticed a slight delay in load time and no change in overall performance. The compression took about an hour on a 990 ssd and used 100% cpu so be prepared.

I know there has been a lot of discussion regarding install size, this may be a good solution for some users. As a disclaimer, I am not at all affiliated with the program, I just saw an article on it and wanted to give it a try.