Phew! That was a close one. I bought an external hard drive to back up all of my files but then couldn't find any of my pictures! So, I called the 1800 apple number and talked to a very peasant, although young sounding, Jay. After 33 minutes of walking through various steps, he helped me open what I thought were my lost files of photos. I then completed the iPhoto upgrade and all is good. Like I said, phew.