Next, you add the folder to iTunes. There are two ways to do this: by dragging and dropping, or by importing.
To drag and drop, begin by finding the folder on your desktop. Then, make sure iTunes is displaying your music library. Drag the file into your iTunes window. A plus sign should be added to the folder. Drop it there and the music in the folder will be added to iTunes.
To import, begin by going to iTunes. In the File menu, you will find an option called Add to Library (on a Mac) or Add Folder to Library (on Windows). Choose this.