The Transformer Book T100TAM has a better storage medium than most portable PCs of a comparable spec and age to it. This portable PC has an HDD storage medium, whereas most 2 in 1 laptops that were launched around the same time as 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 actually the worst storage medium amongst all similar spec laptops that have been on the market for a comparable time to the Transformer Book T100TAM.
Amongst comparable types of portable PC the best storage medium is SSD.
Laptops with a better storage medium that might be worth considering include the Lenovo Yoga (SSD), or the HP Pavilion x360 (£382.66) (SSD).