file storage device
Computing term for a device or system that stores files, such as a hard disk, SSD, or network-attached storage.
This file storage device can store large amounts of data.
A more general loanword for storage, often used in IT contexts, while ファイル記憶装置 specifically refers to a device for storing files.
Compound of ファイル (file) + 記憶 (storage/memory) + 装置 (device). A straightforward technical term.