I bought leopard the other day and want to do an install and erase. My Macbook is about a year old and I have never backuped any of the data. I used to be a PC user and backuped files simply by copying and pasting a copy on an external hard drive. This seems to work with my documents on mac too. How do I backup my photos and music? Everything is on iPhoto and iTunes right now. Appreciate that help!