The Asus E402MA has an SSD storage medium which is better than most many processor core laptops that have been around for more than a year. Most similar spec notebook PCs that were released one year ago have an HDD storage medium. Flash drives store data in semiconductors on a circuit board rather than using magnetic or optical media. Flash have no moving parts which makes them very fast and reliable.
This notebook PC's storage medium (SSD) is in fact the best storage medium amongst all many processor core laptops that have been on the market for more than a year.
An HDD storage medium is the worst storage medium amongst similar types of notebook PC.