The EliteBook 840 has an SSD storage medium which is better than the HDD storage medium found on most notebook 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.
An SSD storage medium is actually the best storage medium amongst all medium processor core notebook PCs that are a comparable age to the EliteBook 840.
The worst storage medium across comparable types of portable PC is HDD.
We compared this notebook PC to all the other notebook PCs that have an SSD storage media and we think because of it's better review score, the ProBook 640[pl_2351423_price], and the ProBook 640[pl_2351423_price] both from HP is also worth considering.
If the storage medium of this medium processor core notebook PC is not good enough for you then you might want to look at the Lenovo X230[plb_1465106_price] (SSD), or the DELL Latitude 12 7000[plb_2699090_price] (SSD).