Magnetic+backing+storage+media

=__Magnetic backing storage media__ = Computer data storage refers to computer components, devices, and recording media that hold digital data used for computing for some period of time. Storage today more commonly refers to mass storage — optical discs, forms of magnetic storage like hard disk drives, and other types slower than RAM, but of a more permanent nature.  Magnetic storage uses different patterns of magnetization on a magnetically coated surface to store information. Magnetic storage is non-volatile. The information is accessed using one or more read/write heads which may contain one or more recording transducers. A read/write head only covers a part of the surface so that the head or medium or both must be moved relative to another in order to access data.

In modern computers, magnetic storage will take these forms:
Magnetic disk (fixed hard drive) Is a memory device, that is covered with a magnetic coating on which digital information is stored. Floppy Disk Is a flexible plastic disk coated with magnetic material and covered by a protective jacket, used mainly by computers to store data magnetically. Hard disk drive, used for secondary storage  A hard disk drive storage device that stores digitally encoded data on rapidly rotating rigid with magnetic surfaces. An HDD today is typically a sealed unit with fixed media. Magnetic tape data storage, used for tertiary and off-line storage  Magnetic tape has been used for data storage for over 50 years. Modern magnetic tape is most commonly packaged in cartridges and cassettes. When storing large amounts of data, tape can be largely less expensive than disk or other data storage options. Tape storage has always been used with large computer systems. Modern usage is primarily as a high capacity medium for backups and archives.