The ZBOX PI320 has a faster storage speed than most medium processor core personal computers that have been on the market for around the same time as it. This personal computer has an SSD storage medium, whereas most desktop computers that have been available for 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 PCs of a comparable age and type to the ZBOX PI320.
Across comparable types of computer the worst storage speed is HDD.