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Option 4 : D only

Magnetic storage is frequently utilised in comparison to other storage technologies.

  • Magnetic data storage is one of the most extensively utilised methods of digital data storage.
  • The magnetic surface is divided into very small sections, each with a magnetization that is relatively uniform.
  • Magnetic storage is read-write allowing you to reuse the store space by removing older data.
  • It stored data outside the computer for a long period of time. 
  • The main disadvantage of magnetic storage is the slowness with which data may be accessed.
  • Magnetic storage for nonvolatile data storage in the form of an external hard drive. 

​Therefore, Magnetic storage is an external hard drive with respect to the computer storage device.

  • DVD stands for digital versatile disc and is a type of optical disc used for data storage and multimedia platforms. It was invented in 1995 and its storage capacity range from 4.7 GB to 17.08 gigabytes. 
  • Compact disc read-only memory or CD-ROM is a type of computer memory that is stored on a compact disc and read by optical means. In 1982, Japanese company Denon developed CD-ROM. 
  • A USB flash drive is a portable storage device with flash memory that is small enough to be carried. It was invented by Fujio Masuoka in the early 1980s.
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