The Transformer Book T300FA has a better storage medium than most comparable spec portable PCs that have been available for around the same time as it. This Asus portable PC has an HDD storage medium, whereas most similar spec portable PCs that have been on the market for a comparable time to it have an SSD storage medium. 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 across all laptops of a comparable type and age to the Transformer Book T300FA.
An SSD storage medium is the best storage medium amongst comparable types of portable PC.