The Toshiba L15 has a better storage medium than most similar spec portable PCs that are a comparable age to it. This notebook PC has an SSD storage medium, whereas most notebook PCs of this spec and age 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.
This notebook PC's storage medium (SSD) is in fact the best storage medium across all medium processor core laptops that have been on the market for more than a year.
An HDD storage medium is the worst storage medium across similar types of notebook PC.