The Acer Chromebox CXI has a faster storage speed than most personal computers of this type and age. This personal computer has an SSD storage medium, whereas most PCs that were released more than two years ago 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 similar spec PCs that have been on the market for a comparable time to the Chromebox CXI.
Across similar types of desktop computer the worst storage speed is HDD.