The DELL XPS 13 has a better storage medium than most medium processor core laptops that were released around the same time as it. This notebook PC has an SSD storage medium, whereas most notebook PCs that have been on the market for a comparable 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.
An SSD storage medium is actually the best storage medium across all portable PCs of this type and age.
The worst storage medium amongst comparable types of portable PC is HDD.
There are a number of other laptops that have an SSD storage media currently available that you might also want to consider including the Pro[pl_1496960_price], the EliteBook 840[pl_2356711_price], or the EliteBook 820[pl_2746818_price] all from HP which has better reviews.