The Lenovo Flex 2 has an HDD storage media which is better than most portable PCs of this type and age. Most notebook PCs that have been on the market for a similar time to it 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.
This notebook PC's storage medium (HDD) is actually the worst storage medium across all portable PCs of a comparable spec and age to the Flex 2.
The best storage medium across comparable types of notebook PC is SSD.
If you would prefer a laptop with a better storage medium then you might want to consider the Toshiba U920t (SSD) which also has a higher rating.