The Lenovo Yoga 2 has an HDD storage medium which is better than most 2 in 1 laptops that have been around for a similar time to it. Most 2 in 1 laptops that were released one year ago have an SSD storage medium. 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 in fact the worst storage medium across all portable PCs of this age and spec.
Across comparable types of laptop the best storage medium is SSD.
If the storage medium of this 2 in 1 laptop is not good enough for you then you might want to consider the HP 13-r100dx (Hybrid-HDD).