While Microsoft began packing the 60GB HDD with $300 Xbox 360 Pro models earlier this year, the larger-capacity drive had not been available to those that owned the previous Pro models, which were bundled with a 20GB hard drive.

Until now, the only option for more capacity has been the $140 120 GB hard drive, also bundled with the $400 Xbox 360 Elite model. For those that bought the Xbox 360 without a sizeable storage device, Microsoft is offering free memory cards and a discount on the 20GB hard drive.

"This is the perfect upgrade path for those looking to enjoy all that the New Xbox Experience has to offer including streaming movies and TV episodes offered by Netflix, Avatar creation, Xbox Live Parties and much more," wrote Microsoft.