Secondary storage (often also called auxiliary storage) is anything that stores data other than the temporary storage in things like RAM.
In a personal computer, secondary storage usually consists of a hard disk and removable media.
External storage is also secondary storage. External secondary storage devices are used to:
- back up data
- add more storage space for files, photographs, videos, and so on
- transfer files between computers
- easily transport files without taking your computing device with you
- share files over a network.
Different types of non-volatile secondary storage include the following:
- magnetic storage
- optical storage:
- compact disk (CD)
- digital versatile disk (DVD)
- Blu-ray disk (BD)
- solid-state disk
- USB drive (memory stick or pen drive)
- flash memory card.
- In your own words explain the purpose of secondary storage and why it is necessary in a computer system.
- Computers in the 1990’s had a hard disc capacity of 4-8Mb. This was sufficient to
store all the programs and data. In today’s market, on a typical home computer, what
is the average capacity available for: