Capital Allocation Framework

19 WESTERN DIGITAL CONFIDENTIAL © 2022 WESTERN DIGITAL CORPORATION OR ITS AFFILIATES ALL RIGHTS RESERVED GAAP to Non-GAAP Reconciliations (continued) In millions, except per share amounts; unaudited GAAP Net Income Contamination related charges Stock-based compensation expense Amortization of acquired intangible assets Recoveries from a power outage incident Employee termination, asset impairment and other charges Non-cash economic interest and Other Income tax adjustments Non-GAAP Net Income Diluted Income Per Common Share GAAP Non-GAAP Diluted Weighted Average Shares Outstanding GAAP Non-GAAP Q4F21 $ 622 Fe‛རྒྱ"®⌘ Q3F22 $ 25 203 86 39 (7) 4 (1) (4) 2 (95) $ 521 $ 680 $ 1.97 $2.16 315 315 172 $ 0.08 $ 1.65 316 316 Q4F22 $ 301 4 77 40 19 (14) 140 $ 567 $ 0.95 $ 1.78 318 318

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