The Flex 10 has an HDD storage medium which is better than the SSD storage medium found on most laptops of a comparable age and spec 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 notebook PC's storage medium (HDD) is in fact the worst storage medium across all comparable spec laptops that have been available for more than two years.
An SSD storage medium is the best storage medium amongst similar types of notebook PC.