I switched from iPhoto to Aperture, and imported my iPhoto library. I told it to move my library, but when I look at the size of each folder here is what I see: Aperture: Masters: 191.16 GB Previews: 8.05 GB iPhoto: Masters: 74.9 MB Previews: 57.86 GB The previews folder is huge for iPhoto! Way bigger than the previews folder for Aperture. Why would that be? If I don't use iPhoto anymore, can I delete it? I would really like that almost 60 GB of space, my computer is starting to run out of room, but I'm afraid Aperture is somehow using it and it will screw up Aperture.