Aug 6 : Data storage companies tumbled in premarket trading on Thursday after quarterly results from Sandisk and Western Digital failed to sustain momentum in an industry that has become one of Wall Street's hottest bets this year.Shares of Sandisk lost 9.2 per cent to trade at $1,226.04, while Western Digita

Sandisk stock dipped nearly 5% premarket ahead of Aug. 5 earnings. Wall Street expects $33.38 EPS on $8.24B revenue.

Sandisk (SNDK) dips premarket ahead of Q4 earnings. Wall Street expects big EPS growth. Here are key technicals and earnings estimates.