The ThinkPad T550 has a better storage medium than most portable PCs that were launched around the same time as it. This Lenovo laptop has an SSD storage medium, whereas most notebook PCs of this spec and age 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 portable PC's storage medium (SSD) is actually the best storage medium amongst all medium processor core laptops that came out more than a year ago.
An HDD storage medium is the worst storage medium across comparable types of portable PC.
We compared all the other portable PCs that have an SSD storage media to this notebook PC and we think the Latitude 14 E7450, and the Latitude 14 E7450 both from DELL which is cheaper; or the Satellite Z30, and the Satellite Z30 both from Toshiba which has better reviews are also worth considering.
If the storage medium of this medium processor core notebook PC is too bad for you then you might want to look at the HP Elitebook 1040 G2 (SSD).