I dragged a folder containing lots of music into my iPod touch in iTunes. A message pops up saying there isn't enough room and it will try to transfer as many songs as possible. I click the button to dismiss the message, and then it will start transferring songs. After transferring a few songs the message pops up again. This keeps on repeating. I should only have to see this message once, right? Why does it keep coming up? What is the solution?