Have a Windows background, but this MAC is driving me crazy. Installed boot camp but now want to remove it, wipe the entire drive, reload the operating system, and start over. But before doing so, I need to save some of the pictures and other files. How do I know which are the real files, and which are simply "pointers." I have spent $$$ on instruction books, but none of them seem to have the answers. I have too many questions for a forum, but where can I go to find some simple answers such as to how much space is left on the hard drive? Thank you!