The HP Z440 has an HDD storage medium which is faster than most personal computers of this spec and age. Most comparable spec desktop computers that are a similar age to it have an SSD storage medium. A Hard Disk Drive (HDD) is the traditional storage method for computers. A HDD stores the information on magnetic disks. HDD drives are cheap, but they are slower than Flash and SSD bases storage systems.
We think you might also be interested in some of the other HDD desktop computers currently available including because of it's better review score, the Z440[pl_2748743_price], or the Z840[pl_2783988_price] both from HP.
PCs with a faster storage speed that might be worth considering include the Lenovo Thinkstation P500[plb_2765684_price] (SSD) which also has a higher rating.