The Asus T100TA has an HDD storage medium which is better than the SSD storage medium found on most 2 in 1 laptops that came out around the same time as 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 medium is in fact the worst storage medium amongst all laptops of this age and type.
The best storage medium across comparable types of notebook PC is SSD.
If you are looking for a notebook PC with a better storage medium then you might want to look at the Lenovo Yoga (SSD) which also has a higher rating.