What are non-volatile memories and solid-state drives?

Non-volatile memory (NVM) or non-volatile storage is a type of computer memory that can retain stored information even after power is removed. In contrast, volatile memory needs constant power in order to retain data. Examples of non-volatile memory include flash memoryread-only memory (ROM), ferroelectric RAM, most types of magnetic computer storage devices (e.g. hard disk drivesfloppy disks, and magnetic tape), optical discs, and early computer storage methods such as paper tape and punched cards.[1] (https://en.wikipedia.org/wiki/Non-volatile_memory)

solid-state drive (SSD) is a solid-state storage device that uses integrated circuit assemblies to store data persistently, typically using flash memory, and functioning as secondary storage in the hierarchy of computer storage. It is also sometimes called a solid-state device or a solid-state disk,[1] even though SSDs lack the physical spinning disks and movable read–write heads used in hard disk drives (HDDs) and floppy disks.[2] (https://en.wikipedia.org/wiki/Solid-state_drive)

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