The Asus EeeBook X205TA has a better storage medium than most comparable spec notebook PCs that have been around for more than a year. This notebook PC has an SSD storage medium, whereas most notebook PCs that have been available for around the same time as it 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.
An SSD storage medium is in fact the best storage medium amongst all notebook PCs that have been available for more than a year.
An HDD storage medium is the worst storage medium across comparable types of notebook PC.