The Lenovo X1 has a better storage medium than most medium processor core notebook PCs that came out more than two years ago. This notebook PC has an SSD storage medium, whereas most similar spec portable 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 notebook PCs of a comparable type and age to the X1.
An HDD storage medium is the worst storage medium amongst comparable types of laptop.
If the storage medium of this Lenovo portable PC is not good enough for you then you might want to consider the T420s (SSD), or the S540 (SSD) both from Lenovo.