[Significant Decline in Storage Sector Pre-Market for U.S. Stocks: SanDisk, Seagate, Western Digital All Down Over 4%] BlockBeats News, August 18, according to BIT (bit.com) market data, the storage sector for U.S. stocks experienced a significant decline pre-market: SanDisk (SNDK) fell 5.26%; Seagate Technology (STX) fell 4.34%; Western Digital (WDC) fell 4.88%; Micron Technology (MU) fell 3.6%; SK Hynix ADR fell 4.1%.