The 400 G2 Mini has an SSD storage medium which is faster than the HDD storage medium found on most similar spec desktop computers that came out in the last 12 months. 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 comparable spec desktop computers that have been available for the last year.
The worst storage speed across comparable types of personal computer is HDD.