Solid state disc drive
Computers have a (secondary) storage device called a disk drive, It is where all your apps are stored. There are currently two types of storage device, the magnetic hard disk drive and the solid state disk drive.
How does a solid state drive work?
- When you take the cover off a solid state drive, you will see NAND flash memory cells (as below)
- Inside NAND flash memory cells are billions of "Floating gate transistors"
- Floating gate transistors (are a bit like cups that) hold electrons
- If one floating gate transistor contains electrons, the computer reads it as a "zero". If another floating gate transistor is empty of electrons, the computer read it as a "one"