Just bought a 64gb Air to replace my 32gb iPad 2. I have a 32gb 5S as well. I wasn't syncing all of my music to my iPad 2 or my iPhone because of storage, but with the extra storage on the Air, is there a way to sync different songs to different devices? I have iTunes set to sync only checked songs, but if I checked off some more, is there a way to have it only sync the extra songs to the Air and not the iPhone?