Can't import assets from old project


I am fairly new to Unity, and I started some projects to try it out.
I downloaded quite some assets from the asset store, and now I want to import them in my new project. How can I do so?

I have found where the assets are located, but they don’t want to import…

You don’t need to find where they’re located, just go to the download manager in the asset store window and click Import for the assets you want to import.