Section 4 - Understanding Drive Letters

The first aspect of the hierarchical file structure in Windows OS you need to understand is the different types of drives (or storage devices) which are named with different letters. Generally, the floppy disk drive is listed as the A: drive. The icon for the floppy will vary depending on the view option that My Computer is set to. The Hard Drive is generally listed as the C: drive.

Windows XP	Windows Vista

Depending on what is installed and whether a computer is networked or not will determine what letter will indicate the different drives.