HDD and SSD Explained

A hard drive is essentially a metal platter with a magnetic coating that stores your data. A read/write head on an arm accesses the data while the platters are spinning.

Hard disks are a delicate piece of equipment and knocks and drops of a console can damage the hard disk, causing loss of data and failure of the unit.

An SSD does functionally everything a hard drive does, but data is instead stored on interconnected flash-memory chips that retain the data even when there's no power present. 

There are no moving parts and operate SOOOO much faster than a standard Hard disk.

Due to the fact that there are no moving parts, they are reliable and not affected by knocks and drops like a standard Hard Disk.