After installing Flutter you will have on Windows:
C:\src\flutter
---> Git repository ---> ~964 MbC:\src\flutter\bin
---> ToolsC:\src\flutter\bin\cache\dart-sdk
----> DART ---> ~418 Mb
Maybe you will need the following paths on PATH environment variable:
C:\src\flutter\bin
---> containsdart.bat
andflutter.bat
C:\Users\miguel\AppData\Local\Android\Sdk\build-tools\29.0.2