Instructions
Power on the Xbox 360. Sign in to your Xbox Live account.
Navigate to the marketplace section in the Xbox dashboard that contains the content you want to download.
Highlight "Explore Content" and press "A" on the game controller.
Highlight the content you want to download, then press "A."
Select "Download" or "Purchase," then press "A." If Microsoft Points are needed to download the item, you will be prompted to purchase an appropriate amount.
Select a hard drive device if prompted, then press "A."
Highlight "Confirm Download," then press "A." The file will be downloaded to the Xbox 360.