The LifeBook S904 has a better storage medium than most laptops of this age and type. This notebook PC has an SSD storage medium, whereas most portable PCs of this age and type 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 portable PC's storage medium (SSD) is actually the best storage medium across all laptops of this spec and age.
The worst storage medium across similar types of portable PC is HDD.
If the storage medium of this notebook PC is not good enough for you then you might want to consider the T420s[pl_48433_price] (SSD), or the S540[pl_2433540_price] (SSD) both from Lenovo.