A solid-state drive is really quicker than any standard hard disk. It is because an HDD works by using rotating disks, that can rotate only so fast and the more information is read and written, the slower and warmer they become, whereas an SDD employs modules of flash memory, therefore there are no actually moving components. The access speeds for an SSD are significantly higher, which makes this kind of drives an ideal solution any time speed is needed. Because of this SSDs are often used for the Operating System on a personal computer and for storing data that's used repeatedly on hosting servers. Many service providers also use a combination of both drives, so they store the data on hard-disks, but they use a couple of solid-state drives in order to cache the more frequently used data and consequently, the data loads a lot faster while the load on the HDDs is decreased since their disks have to spin less frequently to read and write.