The Lenovo YOGA 3 Pro 13.3" 2 in 1 has an SSD storage medium which is better than the HDD storage medium found on most laptops of a similar age and type 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 portable PC's storage medium (SSD) is in fact the best storage medium across all medium processor core laptops that were launched around the same time as the YOGA 3 Pro 13.3" 2 in 1.
An HDD storage medium is the worst storage medium amongst comparable types of portable PC.
Notebook PCs with a better storage medium that might be worth considering include the DELL XPS 13 (£494.59) (SSD).