Solid State Drive (SSD) is a solid state storage device that uses integrated circuit assemblies to store data persistently, typically using flash memory. SSDs lack the physical spinning disks and movable read–write heads used in hard drives. Compared with the HDDs, SSDs are typically more resistant to physical shock, run silently, and have quicker access time and lower latency. SSDs store data in semiconductor cells. SSD storage devices vary in their properties according to the number of bits stored in each cell. While the price of SSDs has decline over time, SSDs are still more expensive per unit of storage than HDDs as of now. But we have to replace HDDs in applications where speed, power consumption, small size, high capacity and durability are important.