The Lenovo Yoga 2 has an HDD storage medium which is better than the SSD storage medium found on most laptops of this age and spec. 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.
This notebook PC's storage medium (HDD) is in fact the worst storage medium across all laptops of a comparable type and age to the Yoga 2.
Across similar types of notebook PC the best storage medium is SSD.