When it comes to storing all the stuff on your gaming PC, you have two options: cheap and big hard drives (HDD) or more expensive but much faster solid-state drives (SSDs). A good SSD makes everything you do on your PC feel speedy. Programs pop right open. Files copy in seconds. Perhaps most importantly, your games will load faster, and big open-world games that load data as you play will run smoother, with fewer hitches and hiccups.
Source: IGN PC Articles