secondary memory

What is Secondary Memory:

1. . The secondary memory is also called the storage device of computer.
2. The terms secondary memory and storage device are used interchangeably.
3.  In comparison to the primary memory, the secondary memory stores much larger amounts of data and information (for example, an entire software program) for extended periods of time. 
4. The data and instructions stored in secondary memory must be fetched into RAM before processing is done by CPU.
5. Magnetic tape drives, magnetic disk drives, optical disk drives and magneto-optical disk drives are the different types of storage devices.