Uncheck platforms you do not intend to build for (Android, iOS, Linux, TVOS) to save tens of gigabytes of space.
You have the engine. Now, let’s quickly install the essential extras. download and install unreal engine
Save the installer file to your computer and run it. Follow the on-screen prompts to complete the installation of the Epic Games Launcher. Step 2.3: Install Unreal Engine Uncheck platforms you do not intend to build