So, I downloaded Nier Automata to my external HD. It's like 48 gigs. I wanted to now move it over to my SSD. The issue I'm having is space. I don't have a big SSD. I put the game's files in my steam folder where it's supposed to go, and then I hit install thinking it would just read the files I moved and over and it'd be good to go. The problem is it won't let me install because it needs another 48 gigs on my SSD, which I can't provide.
I didn't find the right solution from the internet. References: