If you look at the valuation of Western Digital ($WDC) these days you will find that the stock is very undervalued. According to YahooFinance it has a PEG ratio (5 years) of 0.2 !

As regards technical performance, the stock has lagged behind lately and is currently trading below its 20, 50 and 100 days moving average:

Value investing requires patience: even though the stock is trading at a discount with regards to projected future earning, timing is of the essence and one would need to watch if the market recognizes the value of Western Digital before starting a position.