Storage devices

Storage devices

1. Optical

   • examples
     • CD's
       • CD's cost anywhere from £3 to £15
     • DVD's
       • These range from £3 to £7.99
     • blu-ray discs
       • £10 to £20
   • Disadvantages
     • Easily scratched
     • Low capacity
   • advantages
     • Portable
     • Cheap
     • Can be used in a variety of different devices

2. Solid state

   • Disadvantages
     • Not cost effective
   • advantages
     • High read and write speed
     • Energy efficient
     • Durable
   • Examples
     • Computer RAM
       • They range from £40 to £290
     • Flash drive
       • anywhere from £3.00 to £40.00
     • SSD
       • They range from £30 to £110

3. Magnetic

   • examples
     • Floppy disc
       • The cost from £50 to £90, which is quite a lot in my opinion, because of the low capacity.
     • Tape drive
       • £6 to £30
     • Hard drive
       • £30 to £300
   • advantages
     • Magnetic storage can contain a lot of information
   • Disadvantages
     • Less durable than solid state

4. Purpose

   • What do we use storage for?
     • storing files (files, operating system, applications ) permanently

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