The Stream Mini 200 has a faster storage speed than most PCs that have been available for a similar time to it. This HP PC has an SSD storage medium, whereas most personal computers that are a comparable 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 amongst all few processor core computers that are a similar age to the Stream Mini 200.
The worst storage speed amongst similar types of computer is HDD.