noun
archive photo; file photo; reference photo
A photograph kept for reference, documentation, or archival purposes, often used in journalism, research, or record-keeping.
新聞記事には資料写真が添えられていた。
An archive photo was attached to the newspaper article.
この資料写真は十年前のものです。
This file photo is from ten years ago.
Compound of 資料 (しりょう, 'reference material') and 写真 (しゃしん, 'photograph').