The storage speed of this computer is HDD, which is typical of many desktop computers that were released around the same time as 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.
If the storage speed of this few processor core personal computer is too slow for you then you might also want to look at the Chromebox (SSD), or the M075U (SSD) both from Asus which is also cheaper.