The HP EliteBook 850 has an SSD storage medium which is better than the HDD storage medium found on most medium processor core notebook PCs that are a comparable age to it. 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.
This laptop's storage medium (SSD) is in fact the best storage medium across all laptops that have been on the market for around the same time as the EliteBook 850.
Across similar types of laptop the worst storage medium is HDD.
We think you might also be interested in some of the alternative laptops that have an SSD storage media currently available including the XPS 13[pl_1304263_price], the XPS 13[pl_2618156_price], or the XPS 13[pl_1304263_price] all from DELL which is cheaper.