When I go to My Pictures, all I see is an iPhoto icon. I am assuming this holds all of my photos because it is 15GB in size. If I want to manually backup my files by clicking and dragging to an external hard drive, can I just copy this one icon? I just don't want to be in the position of reformatting my computer and finding out I didn't save all my photos or can't access them due to them being locked to my previous Mac.