The storage speed of this PC is HDD, which is the most commonly found storage medium on PCs of this age and spec. 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 PC is too slow for you then you might want to look at the Shuttle DSA2LS (£148.75) (Flash).