The ZBOX-BI320-U-W2 has an SSD storage medium which is faster than most few processor core computers that were released more than two years ago. Most desktop computers that have been on the market 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.
This computer's storage speed (SSD) is in fact the best storage speed across all few processor core computers that are a comparable age to the ZBOX-BI320-U-W2.
Across comparable types of computer the worst storage speed is HDD.