I'm having trouble understanding how the iPhoto library works. I just bought a new Mac and was transferring my photos from my old Windows PC to my Mac so what I did was to create a folder I labelled "Photos" and inside that folder I created multiple folders for each set of photos (like "trip to...", "x birthday", etc.) and then opened iPhoto and imported the photos from this folders. Inside iPhoto I chose the option that avoids iPhoto from importing this photos to the iPhoto photo library but even after selecting this option the iPhoto photo library on my Finder weights almost the same (a little less actually) than all my photos combined. Does this means that iPhoto did indeed created an iPhoto photo library even tho I didn't want it to? What's the benefit of having iPhoto create its own library instead of having all my photos in different folders in my Finder? if any? I'm confused cause this is my first Mac (and experience with OS X) ever so I hope you guys can help me. Thanks in advance.