You misunderstand slightly, it would seem. The space the ADK takes up on a computer is once the launcher has completely unpacked all of the compressed files, or rather the things that could be compressed.
For example, the size of my ADK install is about 65GB’s… but the drive it’s on has compression enabled, even though it’s a 4TB drive I hoard a lot of data, and with being compressed, it’s down to actually taking up around 61GB’s on the drive.
If you were to redownload the entire thing, I would expect you would be downloading around 50-ish GB’s. I think the ADK was around 45-ishGB’s or around that mark for 210 or something.
-WM