The Flex 15D has a better storage medium than most portable PCs of a comparable age and spec to it. This Lenovo laptop has an HDD storage media, whereas most 2 in 1 laptops that were released around the same time as it have an SSD storage media. 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 media is in fact the worst storage medium amongst all laptops of this spec and age.
Amongst comparable types of notebook PC the best storage medium is SSD.
If the storage medium of this 2 in 1 laptop is too bad for you then you might also want to look at the Toshiba U920t[plb_1453648_price] (SSD and higher rated).