The Acer Chromebox CXI has a faster storage speed than most few processor core PCs that are a comparable age to it. This Acer personal computer has an SSD storage medium, whereas most similar spec computers that were released 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.
This personal computer's storage speed (SSD) is in fact the best storage speed amongst all personal computers of this type and age.
Amongst similar types of personal computer the worst storage speed is HDD.
There are a number of alternative SSD desktop computers currently available which you might also want to consider including the HP Chromebox ($136.05) which is cheaper.
If you are looking for a PC with a faster storage speed then you might also want to look at the Lenovo Thinkcentre M53 Tiny (Flash).