Apple intrdocued the world to their iCloud service during WWDC 2011. The iCloud service is seamlessly integrated into your apps with iOS 5. You can access your data from all your iOS devices, Mac and PC. You can get access to your photos, music and apps. Your email, calendar and contacts will stay synced between all your devices.When you sign up for iCloud you will receive 5GB of free storage. The service is built to maximize your storage by not counting apps, music and books downloaded from the Apple Stores.