The Pavilion x360 has an HDD storage medium which is better than the SSD storage medium found on most notebook PCs of this type and age. HDD is a traditional storage drive which stores the information on magnetic disks. HDD drives are slower than other forms of storage such as solid state drives (SSD) and flash drives.
An HDD storage medium is actually the worst storage medium amongst all laptops of a comparable age and type to the Pavilion x360.
Amongst comparable types of notebook PC the best storage medium is SSD.