secondary memory; secondary storage
Technical term in computing for non-volatile storage that retains data when power is off, such as hard disks and SSDs. Contrasts with 一次記憶 (primary memory).
Secondary storage devices include hard disks and SSDs.
一次記憶 (primary memory) refers to volatile main memory (RAM), while 二次記憶 is non-volatile secondary storage.
secondary storage; secondary memory
Compound of 二次 (secondary) and 記憶 (memory/storage), a direct calque from English 'secondary memory'.