... Library, and Users—folders you didn't put there. (If you upgraded an existing Mac to Mac OS X 10.5, you'll also see all your original hard drive folders nestled among them.) Most of these ... window holds the icons for all the disks connected to your machine—the hard drive, a CD that you've inserted, an iPod, another external hard drive, and so on—as well as an icon called Network. ... folder contains Mac OS 9 itself. (Don't confuse the Mac OS 9 folder, called System Folder, with the one that's just called System—that one contains Mac OS X. ) 2.1.3. What's in Your...