美股存储概念普跌，闪存跌近10%，西部数据跌超6%，美光科技、希捷科技跌超3%。

Group 1 - The core viewpoint of the article indicates a widespread decline in the U.S. stock market for storage-related companies, with significant drops in stock prices for key players in the sector [1] Group 2 - Flash memory stocks experienced a nearly 10% decline [1] - Western Digital saw a drop of over 6% in its stock price [1] - Micron Technology and Seagate Technology both faced declines of over 3% [1]