1. Open iTunes on your Mac or PC.
2. In the menu bar, click File > Add to Library.
3. In the dialog box that appears, navigate to the folder where your Windows Media music files are stored.
4. Select the music files you want to add to your iTunes library and click Open.
5. The selected music files will be added to your iTunes library.
Note: If you have a large music library, it may take some time for iTunes to import all of your music files.