The Latitude E6540 has a better storage medium than most similar spec portable PCs that have been available for more than two years. This DELL laptop has an SSD storage media, whereas most medium processor cores notebook PCs that have been around for around the same time as it have an HDD storage media. 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.
An SSD storage media is in fact the best storage medium across all medium processor cores notebook PCs that have been available for around the same time as the Latitude E6540.
An HDD storage media is the worst storage medium across similar types of portable PC.