I am fairly new to the mac and love it. I have my family set up on it each with a user name. I can;t access their files apart from the public folder and in that is drop box folder. I just wonder why it is called drop box and what it is their for. I have dropbox the internet file sharing system installed on my user name but the dropbox in each users public folder is confusing me. Can you help inform me exactly what this is?