Hard disk drives are the traditional and still common primary storage devices inside computers
They are designed for long-term, permanent storage of the operating system, applications, and all personal files.
These are traditional storage devices that use magnetic platters to store data.
They are a form of non-volatile memory, meaning they retain data even when the computer is powered off.
While HDDs are still in use, Solid State Drives (SSDs) are becoming more prevalent due to their increased speed and durability.