The Lenovo X1 Carbon has an SSD storage medium which is better than the HDD storage medium found on most medium processor core laptops that are a comparable age to it. 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 notebook PC's storage medium (SSD) is actually the best storage medium amongst all laptops of this age and type.
An HDD storage medium is the worst storage medium across comparable types of notebook PC.
If the storage medium of this notebook PC is not good enough for you then you might want to consider the DELL Latitude 12 E7250 (SSD).