How is millions of data kept in such a small area,like underneath the keypad.

Question: How is millions of data kept in such a small area,like underneath the keypad.
- Keywords:
  data,
  design,
  keypad,
  technology
Asked by Curious to Armin on 12 Nov 2019.
- Armin Shams answered on 12 Nov 2019: last edited 12 Nov 2019 1:04 pm
  
  It transfers the data to computer case and stores it on magnetic Hard Disk Drives (HDD) and Solid State Drives (SSD). Thanks to applied Physics, we can store and read data using HDD and SSD.

Question: How is millions of data kept in such a small area,like underneath the keypad.