It's not really necessary on a desktop or laptop., Unlike an iPhone, all you have to do to transfer to a desktop is plug in a USB cable. After that, you select to share your storage with the PC on your android phone and you can operate on it as if it were a USB drive or a digital camera. On an iPhone you have to install iTunes, log on, jump through a bunch of hoops, and then you only get access to a fraction of the phone's filesystem anyway.
