The Lenovo Flex has a better storage medium than most notebook PCs of a comparable spec and age to it. This notebook PC has an HDD storage medium, whereas most comparable spec notebook PCs that have been around for around the same time as 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.
An HDD storage medium is in fact the worst storage medium amongst all comparable spec portable PCs that came out around the same time as the Flex.
An SSD storage medium is the best storage medium amongst similar types of notebook PC.