it's kinda wild, they duplicated the data several times to supposedly help loading times on mechanical hdd's. I guess to keep data sequential and minimize seeks?
And yet, I guess it was technically true:
Our testing shows that for the small percentage of players still using mechanical hard disk drives, mission loading times have only increased by a few seconds in the worst cases.
I don't know how long the loading times in the game are, as I don't play this. But surely +/- few seconds is negligible vs 130 GB duplicated data.