The Asus Zenbook UX301LA has a better storage medium than most similar spec portable PCs that have been on the market for around the same time as it. This notebook PC has an SSD storage medium, whereas most notebook PCs that were launched around the same time as it have an HDD storage medium. Solid State Drives (SSD) store data in semiconductors on a circuit board rather than using magnetic or optical media. Solid State Drives have no moving parts which makes them very fast and reliable.
An SSD storage medium is actually the best storage medium amongst all comparable spec laptops that have been around for more than two years.
An HDD storage medium is the worst storage medium across similar types of notebook PC.
Notebook PCs with a better storage medium that might also be worth looking at include the DELL XPS 13[plb_1304263_price] (SSD and cheaper).