Secondary

• Optical:

  • Laser beams r projected onto a disc
  • If light is reflected back, then data is read as 1
  • If light doesn't reflect, data is read as 0
• Magnetic:

  • Data is stored and read using a read-write head and magnetic platter
• Solid State:

  • Doesn't have any moving parts
  • Low power consumption and high speed is advantageous
• Flash Drive:

  • suitable for moving small files from work to home
  • Portable
• External Hard Drive:

  • suitable for backing up a home computer system
  • Portable
• DVD:

  • suitable for storing multimedia files
  • Portable