iTunes Store: Purchased songs, videos, iPod Games, and albums can be downloaded only once
Summary
When you buy a song, video, iPod Game, or album from the iTunes Store, you are entitled to download it only once.
Note: Some content types are not available in some iTunes Store countries.
Products Affected
iTunes Store
When you buy a song, video, iPod Game, or album from the iTunes Store you are entitled to download it a single time. If you want to download it again, you must purchase it again. You can copy downloaded content between authorized computers.
Important: Make a backup of the content you purchase. In case of data loss, including hard drive failure or replacement, accidental deletion, and so forth, you'll be able to restore it from the backup. See How to back up your media in iTunes for instructions.
Applications purchased from the App Store can be redownloaded free of charge by following the instructions in How to redownload purchased apps from the App Store.
Additional Information
A note about copyright
iTunes software may be used to reproduce materials. It is licensed to you only for reproduction of non-copyrighted materials, materials in which you own the copyright, or materials you are authorized or legally permitted to reproduce. If you are uncertain about your right to copy any material, you should contact your legal advisor. See the iTunes Store Terms of Service for additional information.