Magnetic storage is a method of saving data using magnetic materials. It works by altering the magnetic properties of a medium, such as a hard disk drive or a magnetic tape, to represent information. When data is written, tiny magnetic regions on the surface are changed to store bits of information, which can later be read by a device. This type of storage is commonly used in computers and other electronic devices due to its ability to hold large amounts of data at a relatively low cost. Examples of magnetic storage include hard disk drives and magnetic tapes, which are both reliable for long-term data retention.