storage devices

storage devices

1. optical storage

   • disadvantages
     • can be easily scratched
       • low capacity
   • advantages
     • portable
       • cheap
         • can be used in a variety of devices
   • example
     • CD's DVD's and Blu-rays

2. solid state

   • advantages
     • high red write speed
       • energy efficient
         • durable
           • no moving parts
   • disadvantages
     • not as cost affective
   • examples
     • phones tablets and USB sticks

3. magnetic

   • advantages
     • cost affective
       • high capacity
   • disadvantages
     • les durable then solid state
   • example
     • laptop or computer may be magnetic

4. purpose

   • what do we use storage for?
     • storing data (files operating system applications applications) permanently