The Lenovo Flex 3 has an HDD storage medium which is better than most portable PCs of this type and age. Most notebook PCs of a similar age and spec to it 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.
This laptop's storage medium (HDD) is actually the worst storage medium amongst all laptops that were released around the same time as the Flex 3.
Amongst similar 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 also want to look at the HP 13-r100dx[plb_2547943_price] (Hybrid-HDD).