The Lenovo Flex 2 has a better storage medium than most notebook PCs that were released around the same time as it. This Lenovo portable PC has an HDD storage medium, whereas most laptops of this age and type 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 that came out around the same time as the Flex 2.
An SSD storage medium is the best storage medium amongst comparable types of notebook PC.