Hi I have a MBA that crashed on me while doing an Microsoft office update. I have to reinstall Mountain Lion. The problem is that I have alot of talks (powerpoint presentations that I made) on the computer that I don't want to risk loosing. If I use the recovery utility to get to the install page and then use terminal...can someone please tell me how can I copy the contents of my user folder or the contents of my desktop and documents folder to an external HD or USB? Thanks for your help!