The Precision T5810 has an SSD storage medium which is faster than the HDD storage medium found on most latest personal computers. 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 personal computer's storage speed (SSD) is actually the best storage speed across all medium processor core personal computers that are a comparable age to the Precision T5810.
The worst storage speed across comparable types of personal computer is HDD.