The storage speed of this PC is HDD, which is the most commonly found storage medium on few processor core personal computers that are a similar 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 other HDD personal computers currently available which you might want to look at including the DELL OptiPlex 3020M[plb_2663077_price], or the HP 460-p035na[plb_3700374_price] which is cheaper.
If the storage speed of this computer is not fast enough for you then you might also want to consider the OptiPlex 3040[pl_3242114_price] (SSD), or the OptiPlex 3040[pl_3361212_price] (SSD) both from DELL which is also cheaper.