Before last week, the last Mac I bought was a Mac Classic with a 40MB hard drive. Now I have the top-rung Macbook Pro 15", with Core i7 and 8GB of RAM. It's good to be back. I uploaded my PC music, photos and videos to my Mac and need to clarify something about iPhoto, iMovie and iTunes regarding the storage and use of these files. 1) Am I right that when iPhoto imported all my pics into its library it made a duplicate of all of them? If so, can I just erase the original copies I brought over from my PCs? Also, is it right that in order to get third party apps (like my photo printer app) to access the photos in the iPhoto library, I need to copy them to the desktop or some other more accessible spot? 2) Does the same happen with videos? If I load a video into iMovie, am I creating two copies on my hard disk? That would be a major waste of my 500GBs, which won't last forever if I have two copies of every video. 3) I assume this is not happening with iTunes and I only have one copy of each music file on my Mac, right? It's a brave new world, but my wife and I are already loving the MUCH slicker feel of the Mac. I want to get up the learning curve quickly.