I am new to Apple products and recently i bought the iPod 4g and i have no idea how iCloud works. Can someone explain how this works and the reason iCloud even exists? I know that it is used a basically a back-up file thing but how do i get my music and apps to my other iCloud device, such as my laptop. In this area I am ignorant of iCloud. I would like to know more about this App and how to use it.