The Flex 10 has an HDD storage medium which is better than most portable PCs of this age and type. Most laptops that have been around for a similar time 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 this type and age.
Amongst comparable types of laptop the best storage medium is SSD.
Portable PCs with a better storage medium that might be worth looking at include the Lenovo Yoga (SSD), or the HP Pavilion x360 (£382.66) (SSD).