The preferred file format for iTunes is M4A but you can play songs that are in other audio file formats as well. You can import songs into iTunes from a CD or from your Windows Media collection or even your iPod! Here's how.
Instructions
Import From a CD
1. Insert a CD into your computer's CD-ROM drive. Open iTunes. After your computer reads the CD, it should appear as an icon in the "Source" list.
2. Click on the icon for the CD to display its contents.
3. Click the "Import" button in the top right to add all the tracks. Alternatively, drag and drop individual tracks into your library.
Import Files From Your Hard Drive
4. Click on "File," and then "Add to Library."
5. Locate audio files on your hard drive. Select one and click "Open" to add it to your library.
6. If the file format is incompatible with iTunes, iTunes will ask if you want to convert it. Click "Yes" to begin conversion. You will hear a sound when the conversion ends.
Import From Your iPod
7. Connect your iPod to your computer.
8. Click your "iPod" icon. This brings up the "Summary" screen. If the screen doesn't appear, click the "Summary" tab.
9. Select the "Manually Manage Music or Enable Disk Use" option.
10. Minimize iTunes on your desktop.
11. Open up "My Computer."
12. Click "Tools" and select "Folder Options." Click the "View" tab.
13. Select the "Show Hidden Files and Folders" option under "Advanced Settings." Click "Apply to All Folders," and then click "OK."
14. Bring up iTunes again.
15. Click on "File," and then "Add to library."
16. Browse to "My Computer" and find your iPod. It should appear as if it is an external hard drive.
17.Open up the "iPod Control Folder."
18. Open up the "Music" folder. Examine the contents of your iPod. The filenames will look jumbled, but if you let your mouse cursor hover over a file, the song information will appear.
19. Select a song and click "Open."
Tags: your computer, your iPod, Click File, Click File then, click Open