The HP mt40 has an SSD storage medium which is better than most medium processor core notebook PCs that have been available for more than two years. Most medium processor core notebook 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.
An SSD storage medium is in fact the best storage medium amongst all medium processor core notebook PCs that have been around for a comparable time to the mt40.
The worst storage medium across comparable types of portable PC is HDD.
Laptops with a better storage medium that might also be worth considering include the T420s[pl_48433_price] (SSD), or the S540[pl_2433540_price] (SSD) both from Lenovo.