1. Market-Driven Technology Investing
IDEMA Financial Conference
Dr. Hossein Moghadam
Senior Vice President
Research and Development
November 4, 2004

2. Safe Harbor
During the course of this presentation and subsequent panel discussions, representatives of Western Digital may be making forward-looking statements. These statements can often be identified by the use of forward-looking words, such as "may," "will," "could," "project," "believe," "anticipate," "expect," "estimate," "continue," "potential," "plan," "forecasts," and the like. These forward-looking statements are based on management's current expectations, and actual results could differ materially as a result of several factors, including the factors which are listed in WD’s recent Form 10-K filed with the SEC and its other recent SEC filings, to which your attention is directed.

3. Investment Growth in New Markets
R&D, Capital Equipment, HDD Manufacturing Technology
Desktop
Mobile
Enterprise
Consumer
Retail
Vertical
Investment
Desktop
Yesterday
Today

4. Investment in Technology
Multiple
Applications
Key Technology Investments
Head transducer
Electronics architecture
Manufacturing technology
Reliability
Areal density
Performance
Low acoustics
Power management
Video streaming
Ruggedness
Data integrity
Duty cycle (24/7)
Reliability
Performance
Areal density
Desktop
Yesterday
Today

5. Key Market Segment Attributes
Leverage common attributes across design, manufacturing and technology
Tailor end product to meet specific application requirements

6. Market-Driven Technology Investing
IDEMA Financial Conference
Dr. Hossein Moghadam
Senior Vice President
Research and Development
November 4, 2004