I just upgraded from a 2010 macbook pro to one with new retina display. I have all my old files backed up on an external hard drive, through time machine. I've been told that the new macbook pro has a little less storage then the old one. That being said, when I was setting up my new computer, there is not enough room for ALL my photos from iPhoto. I am willing to delete some of them, but it won't let me pick and choose which photos to access. How can I get around this?