A solid-state drive (SSD) is a type of storage device that uses flash memory to store data. Unlike traditional hard disk drives (HDD), which rely on spinning disks and moving parts, SSDs have no mechanical components. This makes them faster, more durable, and less prone to failure, as they can access data almost instantly. SSDs are commonly used in computers, laptops, and gaming consoles to improve performance and reduce loading times. They come in various shapes and sizes, including 2.5-inch drives and M.2 modules, making them versatile for different devices and applications.