A revision booklet supporting OCR J276 Computer Science Revision for specification point 1.3 Storage:
the need for secondary storage

• data capacity and calculation of data capacity requirements
• common types of storage:
• optical
  *magnetic
  *solid state
• suitable storage devices and storage media for a given application, and the advantages and
• disadvantages of these, using characteristics:
  *capacity
  *speed
  *portability
  *durability
  *reliability
  *cost.