The Lenovo Flex 2 has a better storage medium than most 2 in 1 laptops that were released more than two years ago. This notebook PC has an HDD storage medium, whereas most laptops of a similar 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.
An HDD storage medium is in fact the worst storage medium amongst all portable PCs of a comparable spec and age to the Flex 2.
Amongst similar types of laptop the best storage medium is SSD.
If the storage medium of this 2 in 1 laptop is too bad for you then you might want to look at the Lenovo Yoga (SSD), or the HP Pavilion x360 (£382.66) (SSD).