Document:

EX-4.6

 Exhibit 4.6 
 Thomson Reuters (Tax & Accounting) Services, Inc. 
 Basic
Prototype Defined Contribution Retirement Plan 
 Claims Procedure Amendment 

Thomson Reuters (Tax & Accounting) Services, Inc., as the Prototype Sponsor, hereby adopts this amendment to its pre-approved Thomson Reuters
(Tax & Accounting) Services Inc. Basic Prototype Defined Contribution Retirement Plan (the “Plan”) (formerly known as the AccuDraft Basic Prototype Defined Contribution Retirement Plan) for purposes of reflecting the claims
procedures in the Plan document. This amendment is intended to address the United States Supreme Court holding in CIGNA Corp. v Amara and subsequent case law interpreting that holding. The amendment is effective, with respect to each
individual defined contribution plan adopted by a Sponsoring Employer based on the Plan, as of the later of (a) the first day of the Plan Year that includes the date this amendment was adopted by the Prototype Sponsor or (b) the effective
date of the individual defined contribution plan. 
 SECTION 1. AMENDMENT PROVISIONS

 Section 8.9 of the Basic Plan is amended in full to read as follows: 

 

	8.9	Claims Procedures. The claims procedure required under ERISA §503 and Department of Labor Regulations thereunder is set forth in an administrative policy
regarding claims procedures that is promulgated under Section 8.6 by the Administrator. The terms of such administrative policy are incorporated as part of the Plan by reference. Such administrative policy will be the sole and exclusive remedy
for an Employee, Participant or Beneficiary (“Claimant”) to make a claim for benefits under the Plan. No civil action for benefits under the Plan will be brought unless and until the aggrieved person has (a) submitted a timely claim
for benefits in accordance with the provisions of the claims procedure; (b) been notified by the Administrator that the claim has been denied (or such claim is deemed denied); (c) filed a written request for a review of the claim in
accordance with the claims procedure; and (d) been notified in writing of an adverse benefit determination on review. Any civil action by an aggrieved person will be based solely on the contentions advanced by the aggrieved person in the
administrative review process and the judicial review will be limited to the Plan document and the record developed during the administrative review process. 

 SECTION 2. EXECUTION 
 Thomson Reuters (Tax &
Accounting) Services, Inc., as the Prototype Sponsor, hereby adopts this amendment to the Plan on the date set forth below. 
  

									
					
	 By
	 	/s/ Donald C. Whitmire	 		 		 	Date: April 23, 2012
		 	 Donald C. Whitmire, Senior EditorEX-4.7

 Exhibit 4.7 
 AMENDMENT TO 
 THE WESTERN DIGITAL CORPORATION 401(K) PLAN 

Effective January 1, 2013, and except as otherwise specified herein, the Western Digital Corporation 401(k) Plan (hereinafter referred to as
the “Plan”) is hereby amended as provided herein. 
 WHEREAS, Western Digital Corporation (hereinafter referred to as the
“Employer”) heretofore adopted the Plan effective January 1, 2010; and 
 WHEREAS, the Plan consists of the Accudraft Prototype
Defined Contribution Retirement Plan, Basic Plan Number #01 (hereinafter referred to as the “Basic Plan Document”) and the Accudraft 401(k) Non Standardized Prototype Adoption Agreement #002 (hereinafter referred to as the “Adoption
Agreement”); and 
 WHEREAS, the Basic Plan Document provides that the Employer may change the choice of options in the Adoption Agreement
at any time; and 
 WHEREAS, the Employer desires to change the options in the Adoption Agreement as provided herein; 

NOW, THEREFORE, the Plan is hereby amended as follows: 
 First Change 
 Section 8.1(b) and Section 8.1(d) of the Adoption
Agreement, Rollover Contributions, is hereby deleted in its entirety and shall hereafter read as follows: 
 (b) Rollover
Contributions will be accepted from the following types of plans: (check any that apply) 
  

	 	x	Code §401(a) plans (qualified retirement plans) 

  

	 	 ̈	Code §403(a) plans (qualified annuity plans) 

  

	 	x	Code §403(b) plans (annuities purchased by a Code §501(c)(3) organization and certain educational institutions) 

 

	 	x	Code §408(a) plans (individual retirement accounts) 

  

	 	x	Code §408(b) plans (individual retirement annuities) 

  

	 	x	Code §457(b) plans (governmental only) 

 (d) Rollover Contributions can be withdrawn from the Plan: (check one) 
  

	 	x	At any time 

  

	 	 ̈	Annually on a date set by the Administrator 

  

	 	 ̈	Semi-annually on dates set by the Administrator 

  

	 	 ̈	Quarterly on dates set by the Administrator 

  

	 	 ̈	Monthly on dates set by the Administrator 

  

	 	 ̈	Only upon Termination of Employment and only at the time selected in Section 15.5(f) of the Adoption Agreement 

 Second Change 
 Section 15.1 of the Adoption Agreement, Normal Form of Distribution for Distributions Other than Death Benefits, is hereby deleted in its entirety and shall hereafter read as follows:

  

	15.1	Normal Form of Distribution for Distributions Other Than Death Benefits. The benefit payable to a participant who terminates Employment with the Employer for
reasons other than death will be distributed in the manner selected below. 

  

	 	(a)	x  Lump Sum Payment < x and the Optional Forms of
Distribution are: (check all that apply) > 

  

	 	x	Installment payments 

  

	 	x	Partial payments as requested from time to time by the Participant 

  

	 	 ̈	Any form of annuity which can be purchased from an insurance company (subject to QJSA rules) 

 

	 	(b)	 ̈   Installment Payments <  ̈ and the Optional Forms
of Distribution are: (check all that apply) > 

  

	 	 ̈	A lump sum payment 

  

	 	 ̈	Partial Payments as requested from time to time by the Participant 

  

	 	 ̈	Any form of annuity which can be purchased from an insurance company (subject to QJSA rules) 

 

	 	(c)	 ̈  Qualified Joint and Survivor Annuity <  ̈ and the
Optional Forms of Distribution are: (check all that apply)> 

  

	 	 ̈	A lump sum payment 

  

	 	 ̈	Installment payments 

  

	 	 ̈	Partial payments as requested from time to time by the Participant 

  

	 	 ̈	Any other form of annuity which can be purchased from and insurance company 

 Third Change 
 Section 15.4(a) of the Adoption Agreement, Form of
distribution (other than a required QPSA), is hereby deleted in its entirety and shall hereafter read as follows: 
 15.4(a) Form of
distribution (other than a required QPSA). A Beneficiary can elect to have a death benefit (other than a QPSA) to which he or she is entitled distributed in the following manner: (check all that apply) 

 

	 	x	In a lump sum payment 

  

	 	x	In installment payments (if elected by the beneficiary) 

  

	 	x	In partial payments as requested from time to time by the Beneficiary 

  

	 	 ̈	Any form of annuity which can be purchased from an insurance company (subject to QPSA rules) 

 Fourth Change 
 Section 15.7 of the Adoption Agreement, In-Service Distributions, is hereby deleted in its entirety and shall hereafter read as follows: 

15.7 x In-Service Distributions. Distributions may be made to a Participant
< ̈ who is a NHCE > while he or she is still employed by the Employer as selected below. 
 (a) x Distributions to Participants Still Employed After Normal Retirement Age. Subject to Section 4.2 of the Basic Plan, a Participant who
has reached Normal Retirement Age but has not Terminated Employment with the Employer can withdraw all or any portion of his or her Vested Aggregate Account balance. 
 (b) x Distributions to Participants Still Employed Before Normal Retirement Age. Subject to Section 5.17 of the Basic Plan, a Participant
who has not reached Normal Retirement Age and has not Terminated Employment with the Employer can withdraw all or any portion of his or her Vested Interest in the account or accounts selected below. 

 

	 	(1)	Elective Deferral, QMAC/QNEC Accounts and ADP Safe Harbor Contribution Accounts. A Participant who has reached Age 59 1/2 (at least 591/2) can withdraw
all or a portion of his or her: (check all that apply) 

  

	 	x	Elective Deferral Account 

  

	 	x	Qualified Matching Contribution Account 

  

	 	x	Qualified Non-Elective Contribution Account 

  

	 	 ̈	ADP Safe Harbor Contribution Account 

  

	 	(2)	Non-Safe Harbor Matching Contribution Accounts, Non-Safe Harbor Non-Elective Contribution Accounts and ACP Safe Harbor Contribution Accounts. A Participant who
has satisfied the conditions selected in subparagraph (3) below can withdraw all or a portion of his or her: (check all that apply) 

  

	 	x	Vested Non-Safe Harbor Matching Contribution Account 

  

	 	x	Vested Non-Safe Harbor Non-Elective Contribution Account 

  

	 	 ̈	Vested ACP Safe Harbor Contribution Account 

  

	 	(3)	Conditions for Withdrawals Under Subparagraph (2). A Participant must satisfy the conditions selected below in order to make a withdrawal as selected in
subparagraph (2) above. (check all that apply) 

  

	 	 ̈	The Participant must have a 100% Vested Interest in the account 

  

	 	x	The Participant must have reached Age 59 1/2 

  

	 	 ̈	The Participant must have been a Participant for at least 5 years 

  

	 	 ̈	The amount being distributed must have accumulated in the account for at least 2 years 

 

	 	 ̈	Other                      

 Fifth Change 
 The Match Addendum to the Adoption Agreement is hereby deleted in its entirety and shall hereafter read as follows: 
 Item 1: Non-Safe Harbor Matching Contributions Section 6.1(c), Allocation Requirements 
 As of the last day of a contribution cycle, the Employer shall make a Non-Safe Harbor Matching Contribution on behalf of each “Benefiting Participant,” who is an Eligible Employee of such
Employer. A Non-Safe Harbor Matching Contribution on behalf of a Benefiting Participant shall be in an amount equal to fifty percent (50%) of the Benefiting Participant’s Elective Deferrals for the contribution cycle which do not exceed
five percent (5%) of the Benefiting Participant’s Compensation for the contribution cycle, provided, however, that each Benefiting Participant shall receive a “Minimum Annual Non-Safe Harbor Matching Contribution” equal to
50% of the first $4,000 of the Benefiting Participant’s Elective Deferrals for the Plan Year, provided further, however, that each Benefiting Participant whose Elective Deferrals for a Plan Year equal or exceed five percent (5%) of
Compensation (subject to the Code §401(a)(17) Compensation Limit) for the Plan Year shall also receive a “Minimum Annual Non-Safe Harbor Matching Contribution” equal to two and one-half percent (2.5%) of Compensation (subject to
the Code §401(a)(17) Compensation Limit). 
 Any contribution necessary to provide a Benefiting Participant with the Minimum Annual Non-Safe Harbor Matching Contribution shall be treated as a Non-Safe Harbor Matching Contribution for all purposes under this Plan. For avoidance of doubt, any Participant who is a Benefiting Participant for a
Non-Safe Harbor Matching Contribution with respect to any contribution cycle in a Plan Year shall be a Benefiting Participant for purposes of the Minimum Annual Non-Safe Harbor Matching Contribution, if applicable to such Benefiting Participant, for
such Plan Year. 
 In all other respects, the Plan is hereby ratified and affirmed. 

IN WITNESS WHEREOF, and as evidence of its adoption of this amendment to the Western Digital Corporation 401(k) Plan, the Employer has caused this
document to be executed by its duly authorized officers. 
  

									
		 		 	Western Digital Corporation
					
	Witness:	 	/s/ Jason Bibelheimer	 		 	By:	 	/s/ Jackie Demaria
	Print Name: Jason Bibelheimer	 		 	Print Name: Jackie Demaria
		 		 	Title:	 	SVP, HR
		 		 	Date:	 	11/29/2012

 WESTERN DIGITAL CORPORATION 401(K) PLAN 

ADDENDUM 

Item 1: Non-Safe Harbor Matching Contributions Section 6.1(c), Allocation Requirements 

As of the last day of a contribution cycle, the Employer shall make a Non-Safe Harbor Matching Contribution on behalf of each “Benefiting
Participant,” who is an Eligible Employee of such Employer. A Non-Safe Harbor Matching Contribution on behalf of a Benefiting Participant shall be in an amount equal to fifty percent (50%) of the Benefiting Participant’s Elective
Deferrals for the contribution cycle which do not exceed five percent (5%) of the Benefiting Participant’s Compensation for the contribution cycle, provided, however, that each Benefiting Participant shall receive a “Minimum
Annual Non-Safe Harbor Matching Contribution” equal to 50% of the first $4,000 of the Benefiting Participant’s Elective Deferrals for the Plan Year, provided further, however that each Benefiting Participant whose Elective Deferrals for a
Plan Year equal or exceed five percent (5%) of Compensation (subject to the Code §401(a)(17) Compensation Limit) for the Plan Year shall also receive a “Minimum Annual Non-Safe Harbor Matching Contribution” equal to two and
one-half percent (2.5%) of Compensation (subject to the Code §401(a)(17) Compensation Limit). 
 Any contribution necessary to provide
a Benefiting Participant with the Minimum Annual Non-Safe Harbor Matching Contribution shall be treated as a Non-Safe Harbor Matching Contribution for all purposes under this Plan. For avoidance of doubt, any Participant who is a Benefiting
Participant for a Non-Safe Harbor Matching Contribution with respect to any contribution cycle in a Plan Year shall be a Benefiting Participant for purposes of the Minimum Annual Non-Safe Harbor Matching Contribution, if applicable to such
Benefiting Participant, for such Plan Year. 
  

									
	Signature of the Plan Sponsor:	 		 	
					
	By:	 	/s/ Jackie Demaria	 		 	Title:	 	SVP, HR
	Print Name: Jackie Demaria	 		 	Date:	 	11/29/2012

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