EXCHANGE ACT OF 1934 (Amendment No. )

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¨ Preliminary Proxy Statement


¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))


¨ Definitive Proxy Statement


þ Definitive Additional Materials


¨ Soliciting Material Pursuant to § 240.14a-12



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*** Exercise Your Right to Vote ***

Important Notice Regarding the Availability of Proxy Materials for the

Shareholder Meeting to Be Held on November 14, 2013.










Meeting Information            


     Meeting Type:        Annual Meeting  
     For holders as of:   September 17, 2013  


Date:  November 14, 2013



  Time: 8:00 a.m., PST        

     Location:    3333 Michelson Drive  

    Irvine, CA 92612



Directions: 1-949-672-7000





You are receiving this communication because you hold shares in

the company named above.

      This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at or easily request a paper copy (see reverse side).  

We encourage you to access and review all of the important information contained in the proxy materials before voting.



See the reverse side of this notice to obtain proxy materials and voting instructions.





  Before You Vote   


                    How to Access the Proxy Materials


    Proxy Materials Available to VIEW or RECEIVE:    




  How to View Online:

Have the information that is printed in the box marked by the arrow LOGO (located on the following page) and visit:


  How to Request and Receive a PAPER or E-MAIL Copy:


If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request:


                                 1) BY INTERNET:

                                 2) BY TELEPHONE:     1-800-579-1639

                                 3) BY E-MAIL*:   


* If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked by the arrow LOGO (located on the following page) in the subject line.


Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before October 31, 2013 to facilitate timely delivery.






  How To Vote   


                Please Choose One of the Following Voting Methods



Vote In Person: Many shareholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares.


Vote By Internet: To vote now by Internet, go to Have the information that is printed in the box                                 marked by the arrow LOGO (located on the following page) available and

                                 follow the instructions.


Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.


Voting Deadline: If you vote by Internet or Mail, your vote must be received by 11:59 PM Eastern Time on November 13, 2013. Participants in the Western Digital 401(k) Plan must provide voting instructions for the shares in their plan account by 11:59 PM Eastern Time on November 11, 2013 to allow sufficient time for the plan trustee to vote the shares prior to the meeting.



                    Voting Items             



The Board of Directors recommends a vote FOR

each of the following nominees:


The Board of Directors recommends a vote FOR

Proposals 2 and 3:






2.      To approve on an advisory basis the named

         executive officer compensation in this Proxy



         1a.        Kathleen A. Cote   


         1b.        Henry T. DeNero   


         1c.        William L. Kimsey


3.      To ratify the appointment of KPMG LLP as our

         independent registered public accounting firm for

         the fiscal year ending June 27, 2014.


         1d.        Michael D. Lambert


         1e.        Len J. Lauer


         1f.         Matthew E. Massengill


         1g.        Stephen D. Milligan


         1h.        Roger H. Moore


         1i.         Thomas E. Pardun


         1j.         Arif Shakeel


         1k.        Akio Yamamoto


         1l.         Masahiro Yamamura