Hope you're all doing well, Please can somebody shed light to my queries regarding aperture 3 as I have never use it before. I've search the internet but some of it are confusing and unclear. Basically I want to use store my growing photos in an external hard drive as a working library when editing photos in aperture, my questions are: 1. Will the changes made in the photo (history of edits) save in the external HD? or will it be somewhere in the main Hard drive of the computer? 2. If I use different mac computer with the external HD attached, Will I see the edited files and revert to original photo if I need to? 3. And finally, if I use carbon copy cloner to back up the external aperture library will aperture be able to access it as if it is the working external library? many thanks.