The NP915S3G has a better storage medium than most many processor cores laptops that have been available for more than two years. This portable PC has an SSD storage media, whereas most laptops that have been on the market for a similar time to it have an HDD storage media. 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.
This portable PC's storage medium (SSD) is in fact the best storage medium amongst all many processor cores laptops that are a similar age to the NP915S3G.
An HDD storage media is the worst storage medium amongst comparable types of portable PC.