secondary storage

secondary storage

1. portable

   • USB memory stick
     • easy to use
       • they can last anywere from 10 years to 100 years
         • its really light
   • Micro SD card
     • They are small
       • durable drop proof
         • Quite cheap
           • they last long
   • optical disk
     • they are a bit big
       • they can store quite a lot

2. fixed

   • CPU
     • it can do billions of instruction a second
       • it the main part of the computer the heart
     • Primary storage
       • its quite fast doing instructions
         • volatile needs quite a lot of power