SSD and HDD memory
Our invention is important, because it is easy and faster access. It is needed for saving and finding information. Physics is involved to this because there is magnetism, electromagnetism, mechanical reader, data and electrical signals. There are multiple kinds of storage HDD’s and SDD’s. HDD is slower than SSD memory and it won’t work so many years as the SSD does.
Hard Disk Drive is working with mechanical parts (disks) which are moving coated with magnetic material. The data is stored digitally as tiny magnetized bits on the disk. A magnetic orientation in one direction on the disk could represent a "1", an orientation in the opposite direction could represent a "0".
HDD
How is info read from SSD?
Inside the SSD are five main parts. These are controller, NAND flash memory, SATA interface, SSD PCB and card (circuit board). The information is travelling from the SSD to the computer through a standard SATA connection. Inside the SSD the controller is an embedded processor that bridges flash memory components to the host (such as a computer).
The controller executes codes provided by the SSD's firmware (a mini operating system) to full-fill the data requests from the host. The information is stored and red with zeros and ones. The memory cells store voltage and can be either an on (1) or off (0), which allows them to store data in binary form.
Sources:
http://www.tomshardware.co.uk/forum/294936-32-basics
http://www.seagate.com/gb/en/do-more/everything-you-wanted-to-know-about-hard-drives-master-dm/
http://www.research.ibm.com/research/gmr/basics.html