How many GB is Minecraft java?

The answer to how much gb is Minecraft java is -

8GB is more than enough, in fact it is generally less than 1GB. You can check how big the minecraft folder actually is in windows, by doing the following:

press ⊞ Win + R, which will bring up a prompt. Type %APPDATA% and this will open your appdata folder.

In this folder window that opens there is a .minecraft folder. Right click that, then click properties. In the properties window, you will see how large the folder is.

Also, just pointing out that my technic pack folder is around 800MB, and that has a tonne of mods and a lot of saves.