Apple Time Capsule MB276LL/A (AirPort Extreme Plus 500 GB Storage) A revolutionary backup device that works wirelessly with Time Machine in Mac OS X Leopard Time Capsule can back up and store files for each Leopard-based Mac on your wireless network 500 GB 7200-rpm Serial ATA server-grade hard drive gives you all the capacity and safety you need More than just a wireless hard drive, Time Capsule is also a full-featured AirPort Extreme Base Station with 802.11n technology Works with Mac and PC