The Toshiba L15 has a better storage medium than most laptops of this age and type. This portable PC has an SSD storage media, whereas most medium processor cores notebook PCs that were released one year ago have an HDD storage media. 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 notebook PCs of a similar type and age to the L15.
The worst storage medium amongst comparable types of portable PC is HDD.