A disk drive is a device used to read and write data on storage disks, such as hard disk drives (HDDs) and solid-state drives (SSDs). HDDs use spinning magnetic disks to store data, while SSDs use flash memory, which allows for faster access and retrieval of information. Both types of drives are essential for computers and other electronic devices to store files, applications, and operating systems. Disk drives come in various sizes and capacities, making them suitable for different needs. They can be internal, installed inside a computer, or external, connected via USB or other ports. The choice between HDDs and SSDs often depends on factors like speed, cost, and storage requirements.