The Lenovo X230 has a better storage medium than most notebook PCs that were released more than two years ago. This Lenovo laptop has an SSD storage medium, whereas most laptops that are a similar age to 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 notebook PCs of a comparable spec and age to the X230.
An HDD storage medium is the worst storage medium amongst comparable types of laptop.
We think you might also be interested in some of the other notebook PCs that have an SSD storage media currently available including the Toshiba Tecra A50 which is cheaper.
Laptops with a better storage medium that might also be worth considering include the XPS 13 (SSD), or the Latitude 12 E7250 (SSD) both from DELL or the Lenovo ThinkPad X240 (SSD).