The first-generation iPhone topped out at just 8 GB of storage, while even the iPhone 4 offers only 32 GB. This is supposed to hold all your data – including music. Most people have iTunes music and video libraries of much more than 32 GB. So, you’re forced to choose just part of your iTunes library to include on the iPhone. This can take time and a lot of sorting.
But, iTunes can automatically create an iPhone-optimized playlist that you’ll be sure to love using Smart Playlists.
Smart Playlists are a feature of iTunes in which iTunes can create customized playlists for you from your library based on criteria you enter. For instance, you can create a smart playlist that automatically includes every song from a given year. Or, for our purposes here, every song with a certain rating. We’re going to use Smart Playlists to automatically make a collection of your favorite songs from your iPhone.
To do this, you need to have rated the songs in your iTunes library – not all of them, but enough so that a decent percentage have ratings.