The Lenovo Flex has an HDD storage media which is better than the SSD storage media found on most 2 in 1 laptops that have been around for a comparable time to it. 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 2 in 1 laptops that are a comparable age to the Flex.
The best storage medium across comparable types of laptop is SSD.
Laptops with a better storage medium that might be worth looking at include the Toshiba U920t (SSD) which also has a higher rating.