Secondary storage

Secondary storage

1. optical

   • example Devices
     • dvd
     • blu-ray
     • cd
   • definition
     • optical storage of the storage of the data on an optically readable medium. Data is recorded by making marks in a pattern
   • characteristics
     • it is volatile, they normally have a small amount of storage, it is 3 to 6 MB quick and is fairly heavy.

2. magnetic

   • definition
     • Magnetic storage is one of the most affordable ways to store large amounts of data.
   • characteristics
     • they are volatile, they normally have a high amount of storage. it is 80 to 160 MB and they are very heavy
   • example devices
     • magnetic disk
     • hard disk drive
     • floppy disk

3. solid state

   • defiition
     • Solid state storage (SSS) is a type of non-volatile computer storage that stores retrieves digital information
   • characteristics
     • they are non-volatile, you can get 2 to 64 GB of storage, it is 80 to 250 MB quick and they are light weight
   • example devices
     • SD card
     • USB stick
     • Pen drive