The Chromebox M076U has an SSD storage medium which is faster than the HDD storage medium found on most computers that have been on the market for around the same time as it. 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 amongst all few processor core PCs that came out more than two years ago.
The worst storage speed amongst similar types of desktop computer is HDD.