When I want to remove create-react-app files and folders take a long while? It is not using much of space, like 250MB. Also I have to say my computer removes quickly another files and folders with size of bigger than create-react-app.
I use shift + Delete.
React (and thus create-react-app) has a lot of little dependencies. Each with a lot of files. So, even though there isn't much space being used, it's lots of individual small files that all need to be removed. You can 'observe' this in pretty much any project using NPM/Yarn.