The DELL Latitude 14 E7450 has an SSD storage medium which is better than most comparable spec portable PCs that are a similar age to it. Most portable PCs that were launched around the same time as 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.
This laptop's storage medium (SSD) is in fact the best storage medium across all portable PCs of this age and spec.
Across comparable types of laptop the worst storage medium is HDD.
We think you might also be interested in some of the alternative portable PCs that have an SSD storage media currently available including a cheaper notebook PC such as the Latitude 14 E7450, or the Latitude 12 E7250 both from DELL or you might consider a better rated notebook PC such as the Satellite Z30, or the Satellite Z30 both from Toshiba.
If the storage medium of this DELL notebook PC is too bad for you then you might also want to look at the HP Elitebook 1040 G2 (SSD).