The Chromebox has a faster storage speed than most few processor core computers that were released in the last 12 months. This PC has an SSD storage medium, whereas most few processor core computers that are a similar age to 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 in fact the best storage speed across all few processor core computers that are a comparable age to the Chromebox.
Across comparable types of PC the worst storage speed is HDD.