The Flex 15D has an HDD storage media which is better than most portable PCs of this age and spec. Most comparable spec portable PCs that were released more than two years ago 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.
This portable PC's storage medium (HDD) is actually the worst storage medium across all laptops of this spec and age.
The best storage medium across comparable types of portable PC is SSD.
Portable PCs with a better storage medium that might also be worth looking at include the Toshiba U920t[plb_1453648_price] (SSD) which is also higher rated.