The power of cloud computing has now been extended to your devices like iPhone, iPad, iPod touch, Mac, and PC. It basically means that instead of storing your data and files locally on to your device, you are going to store them in the cloud, meaning storing them on a remote server provided by Apple when you sign up for iCloud. It is very much like your own hard drive in the sky, secure and always accessible. You need to update your devices to IOS 5 and your Mac computer with OS X Lion to use iCloud. Windows pc would require you to have at least Windows Vista or windows 7. Apple says that all its new devices will automatically support iCloud out of the box.
Signing up for iCloud automatically gets you a Free 5GB storage space for your content like mail, documents etc. 5GB should be enough for most people, however, if you wish to upgrade, you can do so with a nominal one time per year charge. The price will depend on how much additional cloud space you require.
This is good as you don’t have to carry everything with you now. Your music, photos, documents can now be pushed wirelessly to all your devices. You store them at one location and can access them using multiple devices wirelessly and securely. It also helps your email, contacts and calendars to stay up to date across all devices.
According to Apple, iCloud is as easy to setup as it is to use. You can set up iCloud on iPhone, iPad, iPod touch, Mac and even on a Windows PC. Detailed setup instructions can be found here http://www.apple.com/icloud/setup/