Any time you're dealing with anything that gets stored in a file The bigger it is the more space. Daisy disk shows how big all of your folders are and then You can dive in to see where exactly the space on your hard drive is being taken up. A lot of people don't take the source files out of The bundled version either whether that's because they like to be able to reference it or if someone doesn't know about an option called 'npm ignore' which will exclude them from view.