The storage speed of this PC is HDD, which is the most frequently found storage medium on desktop computers of a similar type and age to it. 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.
There are a number of alternative HDD PCs currently available that you might want to look at including the BT1AD, or the BT1AD both from Asus which is cheaper.
If the storage speed of this few processor core computer is not fast enough for you then you might also want to look at the Asus Chromebox ($352.79) (SSD) which also has a higher rating.