So my HDD is full. Most of the space is used by either iphoto or itunes. What is the best way to move the pics (which i assume are hidden in the "iphoto library" icon) or music and still retain the use of the files? I've read that the iphoto pics are hidden and any alteration to the contents of the library will hose the app. Don't know if that's true, but I'm trying to free up some space on my hdd and there is 136gb on my external that is not being used.