[U.S. storage concept stocks plunge collectively pre-market, SanDisk and Micron Technology drop over 9%] According to Golden Finance, on June 23, the storage concept sector in the South Korean market suffered a sharp decline, dragging down U.S. storage concept stocks collectively pre-market. Among them, SanDisk and Micron Technology dropped over 9%, Western Digital and Silicon Motion Technology dropped over 8%, Seagate Technology dropped over 7%, and Rambus dropped over 6%.