The Asus NX500JK has an SSD storage medium which is better than most notebook PCs of this age and spec. Most many processor core portable PCs that came out 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 in fact the best storage medium across all laptops of a similar type and age to the NX500JK.
Across comparable types of portable PC the worst storage medium is HDD.
We think you might also be interested in some of the other notebook PCs that have an SSD storage media currently available including the NP905S3G, or the NP905S3G both from Samsung or the HP Pro ($759.95) which has better reviews.