A solid-state drive (SSD) boosts the performance of each app running on it when compared with an ordinary hard-disk drive (HDD). The reason is that a solid-state drive employs a variety of interconnected flash memory modules, so there are no physical parts to move. In comparison, a hard disk employs spinning disks and any reading or writing process causes the disks to spin, which means that the speed of an HDD is restricted. As the cost of the two types of drives also differ, numerous computer systems and web servers are provided with an SSD for the OS and various applications, and a hard disk for file storage, in this way balancing cost and overall performance. A website hosting provider could also use an SSD for caching purposes, which means that files that are used on a regular basis will be kept on such a drive for accomplishing higher loading speeds and for limiting the reading/writing processes on the hard disks.