iphoto: How to safely delete or move photos. I have over 7000 photos. I would really like to move tsome of the older photos to an external hard drive. (They are backed up in Time Machine, but I like the immediacy of having them available.) So question 1 - is it possible to split the iphoto library so that the directory tree points to an external drive in some cases? And if that doesn't work--I am willing to export and delete some of these photos. However, an earlier delete left me with events that have a name in the event folder, but no photos. Question 2 -- How do I properly delete photos so that all references disappear?