The DELL Latitude E6440 has an SSD storage medium which is better than the HDD storage medium found on most laptops of a similar type and 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 notebook PC's storage medium (SSD) is in fact the best storage medium amongst all comparable spec laptops that have been around for more than a year.
The worst storage medium across similar types of notebook PC is HDD.
If the storage medium of this notebook PC is not good enough for you then you might also want to look at the Elitebook 820 G2[pl_2886802_price] (SSD), or the EliteBook 820 G2[pl_2897415_price] (SSD) both from HP.