The Pavilion x360 11-n011dx has an HDD storage media which is better than most portable PCs of a comparable type and age to it. Most portable PCs of this age and spec have an SSD storage media. 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 media is actually the worst storage medium across all portable PCs of this type and age.
An SSD storage media is the best storage medium across comparable types of portable PC.
If the storage medium of this portable PC is not good enough for you then you might also want to look at the Toshiba U920t (SSD) which is also higher rated.