When you back up for iPhone, iPad or iPod touch to your Mac, it stores it deep in your hard drive. But you don't need to go searching for those backups. You can manage them from inside iTunes. This is useful if you want to review your backups and delete old ones from old devices. You can also quickly find them on your drive to see how much space they take up. An archive function lets you save a backup and start a fresh one for a device.