My computer hard drive is full but I still have a lot of space on my iPod. I would like to move most of my iTunes library to a second hard drive but keep recent additions on my computer. Is there a way of using automatic update so that I can automatically add just the new songs on my computer via automatic update without deleting the ones already there? Or do I have to do it manually? Any other solutions for when you have more space on the iPod than on the hard drive?