The Flex 14 has an HDD storage medium which is better than the SSD storage medium found on most portable PCs of this type and age. 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 portable PCs that have been on the market for a comparable time to the Flex 14.
An SSD storage medium is the best storage medium amongst comparable types of notebook PC.
It may also be worth also looking at one of the alternative portable PCs that have an HDD storage media currently available including because of it's better review score, the HP Pavilion x360 ($320.00).
If you want a notebook PC with a better storage medium then you might want to look at the Acer Aspire Switch 10 (SSD and cheaper).