The Asus Transformer Book T200TA has an HDD storage media which is better than the SSD storage media found on most laptops of a comparable spec and age 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.
An HDD storage media is actually the worst storage medium amongst all similar spec portable PCs that have been available for a comparable time to the Transformer Book T200TA.
Amongst comparable types of laptop the best storage medium is SSD.
If the storage medium of this notebook PC is not good enough for you then you might also want to consider the DELL XPS 12[plb_2396801_price] (SSD) which also has a higher rating.