I have a huge collection of photos I have taken over the years and because I own a macbook air 128gb, it would be foolish to store any part of it on the device. i have therefore stored it all in a NAS device connected to my router. now i have added the files from there to iPhoto without copying anything to the macbook air ssd. a few queries therefore arise. do be kind enough to clarify if youre in the know. 1. why has my free storage reduced (by around 1gb, my photo collection is around 8gb) after importing photos on my macbook air via iPhoto even though the files still reside on my NAS device? 2. what happens when i edit a photo in iPhoto? does it store the resulting image in the NAS drive or in the SSD of macbook air? Thanks.