I recently changed my iTunes music folder location to my external hd, and now my music won't play. It says "The song could not be used because the original file could not be found. Would you like to locate it?" I've also tried switching it back to the original iTunes folder from my internal hd and it says the same thing when I click on a song to play. Please someone help me I love my music and I hope I haven't lost them UGH.