The DELL XPS 15 9530 has an SSD storage medium which is better than most laptops of this spec and age. Most many processor core portable PCs that were released around the same time as 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 in fact the best storage medium across all many processor core portable PCs that have been on the market for a similar time to the XPS 15 9530.
Across comparable types of laptop the worst storage medium is HDD.
We compared all the other laptops that have an SSD storage media to this portable PC and we think a cheaper notebook PC such as the HP EliteBook 745 or you might consider a better rated notebook PC such as the ZBook 17, and the ZBook 17 both from HP are also worth considering.
Laptops with a better storage medium that might be worth considering include the ZBook 15 (SSD), or the ZBook 15 (SSD) both from HP.