Investor Presentaiton

5 Flash and Hard Drive Metrics Flash Revenue and Gross Margin © 2023 WESTERN DIGITAL CORPORATION OR ITS AFFILIATES ALL RIGHTS RESERVED Hard Drive Revenue and Gross Margin In billions In billions $ 2.8 40% $ 2.8 40% $ 2.4 $ 2.4 30% 30% $ 2.0 $ 2.0 $ 1.6 $ 1.2 $ 0.8 $ 0.4 $ - TH 20% $ 1.6 20% $ 1.2 10% $ 0.8 10% 0% $ 0.4 -10% $ - 0% Q3F22 Q4F22 Q1F23 Q2F23 Q3F23 Q3F22 Q4F22 Q1F23 Q2F23 Q3F23 Revenue Gross Margin (%) Revenue -Gross Margin (%) Flash Q3F23 Results Bit shipments: decreased 14% QoQ ASP/Gigabyte: Blended: decreased 10% QoQ Like-for-like: decreased 12% QoQ See Appendix for Supplemental Operating Segment Results. Hard Drive Q3F23 Exabyte shipments: increased 15% QoQ Results ASP per drive: $ 109

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