hard drive was near full on my macbook. on the advise of apple support i went out and bought a external HD formated for MAC. followed the directions, drag and dropped 4 years worth of pics on to the ext hd. closed iphoto on the mac book, opened it from the external hd.....all pics were there. ejected the HD, deleted all the pics off the macbook. now when i plug the HD back in all the pics are gone off of i photo!!!!!!!!! from the ext HD!!! ***!!!!!! i am steaming ****** off right now