The Transformer Book T300 Chi has a better storage medium than most notebook PCs that have been around for a similar time to it. This portable PC has an SSD storage medium, whereas most medium processor core laptops that have been available for a similar time to it have an HDD storage medium. Solid State Drives (SSD) store data in semiconductors on a circuit board rather than using magnetic or optical media. Solid State Drives have no moving parts which makes them very fast and reliable.
This notebook PC's storage medium (SSD) is actually the best storage medium amongst all portable PCs that have been available for around the same time as the Transformer Book T300 Chi.
The worst storage medium amongst comparable types of notebook PC is HDD.
Portable PCs with a better storage medium that might also be worth looking at include the DELL XPS 13 (SSD).