The Latitude E6430 has a better storage medium than most notebook PCs of a comparable age and type to it. This portable PC has an SSD storage medium, whereas most medium processor core notebook PCs that were released more than two years ago 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.
An SSD storage medium is in fact the best storage medium amongst all medium processor core notebook PCs that have been on the market for around the same time as the Latitude E6430.
Amongst similar types of portable PC the worst storage medium is HDD.
If you are looking for a notebook PC with a better storage medium then you might also want to consider the T420s (SSD), or the S540 (SSD) both from Lenovo.