The AirPort Time Capsule is both a super-fast WiFi base station and an easy-to-use backup device. Backing up data has never been so easy. Just set it up once and leave the rest on the AirPort Time Capsule. Time Machine in OS X will back up your Mac automatically and wirelessly. That way, you don't have to worry about losing something important. Every photo. Each file. Every song. It even saves your OS X settings and programs. The AirPort Time Capsule stores everything up to 2TB of data.