A solid-state drive (SSD) improves the performance of any application running on it when compared with a classic hard-disk drive (HDD). The reason is that a solid-state drive functions with multiple interconnected flash memory modules, so there're no physical parts to move. In comparison, a hard-disk drive contains spinning disks and each reading or writing process causes the disks to move, which means that the speed of an HDD is restricted. Since the prices of the two types of drives are different as well, a large number of desktops and web servers are provided with an SSD for the operating system and random applications, and an HDD for data storage, in this way balancing price and overall performance. A hosting service provider may also use a solid-state drive for caching purposes, so files that are used frequently will be stored on this type of a drive for accomplishing higher loading speeds and for limiting the reading/writing processes on the HDDs.