[U.S. Stock Pre-Market: Memory and Data Storage Sector Declines] Odaily Planet Daily reports, according to MSX.COM data, the stock prices of companies related to memory and data storage fell during U.S. pre-market trading. Micron Technology (MU.O) dropped 2.8%, SanDisk (SNDK.O) fell 3%, Western Digital (WDC.O) declined 3.5%, Seagate Technology (STX.O) decreased 3.1%, and SK Hynix (SKHY.O) slid 4.8%.