Western Digital Corporation:
nizations of the Treadway Commission (COSO). The Company's management is responsible for maintaining effective
internal control over financial reporting and for its assessment of the effectiveness of internal control over financial
reporting, included in the accompanying Management's Report on Internal Control Over Financial Reporting appear-
ing under Item 9A. Our responsibility is to express an opinion on the Company's internal control over financial
reporting based on our audit.
whether effective internal control over financial reporting was maintained in all material respects. Our audit included
obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness
exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk.
Our audit also included performing such other procedures as we considered necessary in the circumstances. We believe
that our audit provides a reasonable basis for our opinion.
with generally accepted accounting principles. A company's internal control over financial reporting includes those
policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly
reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions
are recorded as necessary to permit preparation of financial statements in accordance with U.S. generally accepted
accounting principles, and that receipts and expenditures of the company are being made only in accordance with
authorizations of management and directors of the company; and (3) provide reasonable assurance regarding pre-
vention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a
material effect on the financial statements.
become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures
by the Committee of Sponsoring Organizations of the Treadway Commission.
and July 29, 2012, the related consolidated statements of income, comprehensive income, shareholders' equity, and
cash flows for each of the years in the three-year period ended June 28, 2013, and the related financial statement
schedule, and our report dated August 16, 2013, expressed an unqualified opinion on those consolidated financial
statements and financial statement schedule.