The ATIV Book 9 has an SSD storage medium which is better than the HDD storage medium found on most many processor core laptops that have been on the market for a comparable time to it. 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 portable PCs that have been around for more than a year.
An HDD storage medium is the worst storage medium amongst comparable types of laptop.