How do you save custom cups / courses?

Hi, I'm new to the game and I'm curious: Is there any way to save custom cups or courses so that I could find them easily in the future without having to write them down.

You can save the URLs of Quick Mode custom Tracks, Arenas, and Cups, and Multicups somewhere safe on a PC or External Hard Drive. Same goes for Complete mode cups and multicups.

For Complete mode custom courses/arenas, You can click the Blue Save button on the right side of the screen.