The Travelmate TMP455-M has a better storage medium than most medium processor core notebook PCs that have been on the market for a comparable time to it. This Acer 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 actually the best storage medium amongst all laptops that were released more than two years ago.
An HDD storage medium is the worst storage medium across comparable types of notebook PC.
If the storage medium of this portable PC is not good enough for you then you might also want to look at the T420s (SSD), or the S540 (SSD) both from Lenovo.