Secondary Storage

Secondary Storage

1. Optical

   • Example Devices
     • CD ROM
     • DVD- ROM
     • BLU RAY
   • Characteristics
     • Quite easy to take around
     • Can Break quite easily
   • Definition
     • Lasers write and read the data using light to find it.

2. Magnetic

   • Example Devices
     • Hard Disk
     • Floppy Disk
     • Magnetic Tape
   • Characteristics
     • One read/write end
     • Use controlled electrical pulses
   • Defintion
     • Mechanical parts move over the disk and write and read magnetically

3. Solid State

   • Example Devices
     • USB drive
     • SD Cards
   • Charcteristics
     • Easy to Take with you
     • Quick to use
   • Defintion
     • A type of non-volatile computer storage that stores and retrieves digital information using only electrical circuits