The LG 13Z940 has an SSD storage medium which is better than the HDD storage medium found on most portable PCs of a comparable spec and 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 in fact the best storage medium across all portable PCs of this age and type.
The worst storage medium across comparable types of notebook PC is HDD.
There are a number of other laptops that have an SSD storage media currently available which you might also want to look at including the Lenovo L540[plb_2993337_price] which has better reviews; or the HP ProBook 450[plb_2643392_price], the DELL Latitude 12 E5250[plb_2854767_price], or the Lenovo ThinkPad E550[plb_2870445_price] which is cheaper.