noun
nonvolatile storage device
Technical computing term for a storage device that retains data without power, such as flash memory, ROM, or hard disk drives.
不揮発性記憶装置は電源を切ってもデータを保持する。
A nonvolatile storage device retains data even when the power is turned off.
Compound of 不 (non-), 揮発性 (volatility), and 記憶装置 (storage device). A technical calque from English 'nonvolatile storage device'.