iTunes for Windows: Import music and video already on your computer
To add media from Audible Manager to your iPod, iPhone, or iPad, you need to first import it into iTunes.
Add items from your computer to your iTunes library
Do either of the following:
Drag a file or folder from the desktop to the iTunes window.
If you add a folder, all the files it contains are added to your library.
In iTunes, choose File > Add to Library or Add Folder to Library, locate a file or folder, and click Open.
By default, adding items to your iTunes library creates a reference to the file’s current location; the original file remains in the current location unless you select “Copy files to the iTunes Media folder when adding to library.” For information about copying files to the iTunes folder instead of creating references to them, see Change where your iTunes files are stored. If the file is an unprotected WMA file and you have Windows Media Player Series 9 or later installed, iTunes makes a copy of the file and adds it to your iTunes library. The original WMA file remains unchanged. You can’t add protected WMA files or protected WMV files to iTunes.