Secondary Storage: Definition, Technology & Devices

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Candidates should be able to:

  • explain the need for secondary storage
  • describe common storage technologies such as optical, magnetic and solid state
  • select suitable storage devices and storage media for a given application and justify their choice using characteristics such as capacity, speed, portability, durability and reliability.

Why is secondary storage needed?
Although RAM can store the data and program files used when a computer system is actually running, it is volatile, meaning it loses its contents without a power source.

A secondary storage device is needed in a computer . . .

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