The Latitude 14 E7440 has an SSD storage medium which is better than most notebook PCs that have been around for more than two years. Most medium processor core laptops that have been on the market for 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 portable PC's storage medium (SSD) is in fact the best storage medium across all notebook PCs of a comparable age and type to the Latitude 14 E7440.
The worst storage medium across similar types of portable PC is HDD.
If the storage medium of this DELL notebook PC is too bad for you then you might also want to consider the DELL XPS 13 (£494.59) (SSD).