Disk cloning is the process of creating an exact copy of a computer's hard drive or storage device. This includes all files, applications, and the operating system, allowing users to replicate their system setup on another drive. Disk cloning is often used for backup purposes or when upgrading to a larger hard drive. The cloned disk can be used to restore the original system in case of failure or to transfer data to a new computer. Various software tools are available for disk cloning, making it accessible for both personal and professional use.