HDD and SSD has its up and down. HDD can store much more than SSD on the same price, has higher life expectancy than SSD, but slow transfer and read rate. SSD are expensive, has lower life expectancy than HDD, but very high transfer and read rate. Imo the best solution is just to mix between SSD for system and gaming, and HDD for mass storage for film, anime, document, and other file that doesnt need high transfer/read rate.