The S400G3 Premium has an SSD storage medium which is better than the HDD storage medium found on most medium processor core laptops that have been available for more than a year. 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 laptop's storage medium (SSD) is actually the best storage medium across all portable PCs of a comparable age and spec to the S400G3 Premium.
An HDD storage medium is the worst storage medium amongst similar types of laptop.