Western Digital fell 2.3% in premarket U.S. trading, with four storage-related stocks also weakening. On Nov. 4, Binance market data showed Seagate Technology, Micron Technology, and SanDisk were all down more than 1% premarket.
· These are premarket quotes, and all four declines are relative to the previous closing prices.
· The source only provides premarket declines; it does not include trading volumes or the reasons behind them.

Which of these four would you first watch for changes in trading volume during the session?