The Flex 10 has an HDD storage medium which is better than most laptops of this type and age. Most notebook PCs of this spec and age 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 actually the worst storage medium amongst all notebook PCs of this spec and age.
Amongst similar types of laptop the best storage medium is SSD.