Secondary Storage

Secondary Storage

1. Solid state (SSD)

   • Used in high end performance computers
     • Data transfer speed is higher
       • It doesn't have to rely on the CPU and RAM as much
   • Used in phones
     • It's very portable and durable so ideal for phones as they move around.
       • They're durable because they have not moving part that will break
     • Data transfer doesn't require as much energy. It's naturally quick so it doesn't put a load onto the CPU and RAM.
   • They are more expensive so you can't get as much memory capacity for the same amount of money as a different type of storage
   • They have a limited read and write span and wear out after a while. Shorter than other storage types

2. Magnetic (HDD)

   • Used in Desktop PCs and servers.
     • It's cost effective compared to SSD so you can get more memory and a higher capacity for the same amount of money.
     • They're plugged into the mains so the don't need power efficient storage
   • It takes up more energy and isn't power efficient so isn't ideal for portable devices that run on battery.

3. Optical (CD/DVD/BluRay)

   • Uses lasers to read and write data
     • Mainly used for films, music, games and programs
   • Not very durable. They can easily be scratched resulting in some errors in the data