Disks, also known as disk storage, refer to a data storage device that uses magnetic or optical technology to store and retrieve digital information. They are commonly used in computers and other electronic devices to store operating systems, applications, and data files. Disks can be internal, such as hard disk drives (HDDs) or solid-state drives (SSDs), or external, such as USB drives or external hard drives. Disk storage is a critical component of modern computing systems and plays a key role in managing and accessing digital data efficiently and securely.