Data fragmentation remains an issue even in the era of mobile devices, and in some cases formatting is the fastest way how to solve it. Optimization is another good reason for hard drive formatting. When you purchase a brand-new hard drive, there’s no guarantee that it will be pre-formatted from the factory, nor is there any guarantee that it will come with the right file system. Even though most people associate formatting with system installation, there are many other reasons why you might want to format your hard drive. Both Mac OS X and Windows allow users to format their hard drives using built-in utilities.
