Mac OS X Disk Organization

Like most other computer operating systems, Mac OS X uses a hierarchical filing system (HFS) to organize and store files, including system files, applications, and documents.

The top level of the filing system is the computer level, which corresponds to the top section of the Sidebar (Figure 1). This level shows the computer’s internal hard disk, any other disks the computer has access to (including iDisk, if you are a .Mac member), and the Network icon.

Figure 1. The top level of your computer shows all mounted disks and a Network icon.

The next level down is the computer’s hard disk level. You can view this level ...

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