The Lenovo Y70 has an SSD storage media which is better than most notebook PCs of a similar type and age to it. Most comparable spec notebook PCs that have been around for a similar time to it 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.
An SSD storage media is actually the best storage medium amongst all many processor cores notebook PCs that have been on the market for around the same time as the Y70.
Amongst comparable types of notebook PC the worst storage medium is HDD.
There are a number of other laptops that have an SSD storage media currently available that you might also want to look at including because of it's better review score, the NP905S3G[pl_1609044_price], or the NP905S3G[pl_1609044_price] both from Samsung.