The HP EliteBook 745 G2 has a better storage medium than most many processor core portable PCs that came out more than two years ago. This portable PC has an SSD storage medium, whereas most many processor core portable PCs that have been available for a comparable time to it have an HDD storage medium. Solid State Drives (SSD) store data in semiconductors on a circuit board rather than using magnetic or optical media. Solid State Drives have no moving parts which makes them very fast and reliable.
An SSD storage medium is actually the best storage medium across all laptops of this type and age.
The worst storage medium across similar types of laptop is HDD.