The Latitude 14 7404 has a better storage medium than most similar spec portable PCs that are a comparable age to it. This portable PC has an SSD storage medium, whereas most laptops that are a comparable age 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.
This notebook PC's storage medium (SSD) is actually the best storage medium across all notebook PCs of this age and type.
An HDD storage medium is the worst storage medium amongst similar types of notebook PC.