I'm preparing to upgrade my mac pro to Leopard. I'm not sure what all I should backup in preparation. I want to do a clean install as this install of Tiger has been used and abused for over a year. All of my actual data is stored on a second hard drive, named Storage. I have Aperture data, iTunes library content, etc... all stored there. What should I do to backup my iTunes library and make sure it gets fully transferred with all info (it would be nice to have play counts, but I can live without if I have to) and album art that I've assigned? What about Aperture? I think I set it up in an odd way when beginning since I didn't really know what I was doing, but I just have an Aperture Library directory with JPGs in it rather than an actual Library package. It's not a large/complex library so I can lose my adjustments and photo groupings if it's too much trouble to transfer. Other than that I'll just reinstall all of my software and start fresh. Other settings I can handle backing up on my own.