Secondary storage is a non-volatile memory, which has the capability to hold data until and unless it has either been deleted or overwritten. It is also known as auxiliary storage, external memory, flash memory, and secondary memory. It must be noted that the prime function of the secondary storage is to compliment the primary storage. Besides that, it is also used as a backup storage medium just like cloud storage to protect from data loss due to computer malfunction, cyber-attack or any other tragedy. Generally, secondary storage technology is about two orders of magnitude cheaper than the primary storage.
