How do i download content online to 'project folder'

Hi just letting you know that i am new to this and please don’t judge if it is right before my eyes. I am trying to make a car racecourse for my IST assignment. So i am trying to download content from a Zac Parrish video (december 9 Live to be exact[here is the URL for the video A new, community-hosted Unreal Engine Wiki - Announcements - Epic Developer Community Forums]) that he has supplied for me to download, he says copy the content and then drag it to the project folder. What i am trying to find out is where to find project folder so i may use this content for my game.

Documents\Unreal Projects by default (on windows).
If you launch the editor via “Epic Games Launcher”, then in the window where you have to select the project you would like to open, if you move the mouse to the preview image of the project, a small popup window will be displayed. It contains the path.