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Key points

  • Rewritable storage can be altered at any time. This means that it can be used to store data that is being changed on a regular basis.
  • Most computers use a rewritable storage device for storing files, to allow the user to add their own files and change data in files.
  • Hard drives are the most popular form of rewritable storage, but mobile devices are more likely to use solid state storage such as an SD Card or an internal memory chip.
  • CD-RW and DVD-RW discs are designed to be rewritable. This is possible because a laser can be used to "reset" a special dye on the surface of the disk that is used to represent 1s and 0s.



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