The Lenovo Flex has a better storage medium than most portable PCs of this type and age. This notebook PC has an HDD storage medium, whereas most notebook PCs of a comparable spec and age 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 portable PC's storage medium (HDD) is in fact the worst storage medium across all comparable spec portable PCs that came out more than two years ago.
Across similar types of portable PC the best storage medium is SSD.