Computer drives are storage devices that allow computers to save and retrieve data. They come in various forms, including hard disk drives (HDDs) and solid-state drives (SSDs). HDDs use spinning disks to read and write data, while SSDs use flash memory, making them faster and more durable. These drives can be internal, located inside the computer, or external, connected via USB or other ports. They are essential for storing operating systems, applications, and personal files, ensuring that users can access their information whenever needed.