What is the current version's install size?

[Souper]

I have changed to a laptop with limited memory (eMMc) and I want to know how much space KSP takes up. Steam is threatening me with about 5.3 gigabytes of memory right now, and I barely managed to scrape enough memory to put that on it. Do you guys know any way to easily free up memory? I am using Windows 10.

[4x4cheesecake]

KSP 1.7.1 with both DLCs: 3.59 GB
Making History takes 398 MB
Breaking Ground takes 421 MB

Steam probably needs more space to install the game (for the download cache) so that's probably the reason why steam want's 5.3GB. I don't know if or how many files steam keeps in the cache but you can clear in manually in the steam settings -> downloads. So if you scraped the 5.3GB already, there should be still some space left after installing the game.