The ZBOX CI320 nano has an SSD storage medium which is faster than most similar spec personal computers that are a comparable age to it. Most medium processor core personal computers that came out around the same time as it have an HDD storage medium. Solid State Drives (SSD) store information in transistors on a circuit board rather than on optical or magnetic media. This has the advantage of being much faster than a traditional HDD drive.
An SSD storage medium is actually the best storage speed across all computers of this spec and age.
The worst storage speed across similar types of computer is HDD.
Other SSD desktop computers currently available that you might want to consider include because of it's better review score, the DELL Precision T5810, the Lenovo P300 Tower, or the Alienware X51.
Computers with a faster storage speed that might be worth considering include the Zotac ZBOX PI320 ($189.26) (Flash) which is also higher rated.