Document:

EX-4.4

 Exhibit 4.4 
 Amendment Regarding Required Minimum Distributions 
 Under WRERA 2008

 Plan Name Western Digital Corporation 401(k) Plan 
 Plan Sponsor Western Digital Corporation 
 This amendment is intended as good faith
compliance with the required minimum distribution provisions of the Worker, Retiree and Employer Recovery Act of 2008 (WRERA). This Amendment supersedes any conflicting provisions of the Plan, any administrative policy, and/or any previously-adopted
“good faith” amendment of the same subject matter, as applicable. This amendment is a “good faith” amendment. It is not part of the pre-approved Plan, and, while it has not been reviewed by the Internal Revenue Service for
compliance with the Notice or the Code, the adoption of this amendment does not, pursuant to Revenue Procedure 2007-44, affect the status of reliance upon the Plan’s pre-approval by the Internal Revenue Service. 

Section 1. 2009 Required Minimum Distributions—Lump Sum (RMDs) 

 

	1.1  x	2009 RMDs Will Be Made Unless the Participant or Beneficiary Elects Not to Receive Them. If this Section 1.1 is checked, then notwithstanding
Section 5.9 of the Plan to the contrary, a Participant or Beneficiary who (a) has not elected an installment form of distribution and (b) would have been required to receive required minimum distributions for 2009 but for the
enactment of Code §401(a)(9)(H) (“2009 RMDs”), and who would have satisfied that requirement by receiving distributions that are (a) equal to the 2009 RMDs or (b) one or more payments in a series of substantially equal
distributions (that include the 2009 RMDs) made at least annually and expected to last for the life (or life expectancy) of the Participant, the joint lives (or joint life expectancy) of the Participant and the Participant’s Designated
Beneficiary, or for a period of at least 10 years (“Extended 2009 RMDs”), will receive those distributions for 2009 unless the Participant or Beneficiary chooses not to receive such distributions. 

 

	1.2   ̈	2009 RMDs Will Not Be Made Unless the Participant or Beneficiary Elects to Receive Them. If this Section 1.2 is checked, then notwithstanding
Section 5.9 of the Plan to the contrary, a Participant or Beneficiary who a Participant or Beneficiary who (a) has not elected an installment form of distribution and (b) would have been required to receive required minimum
distributions for 2009 but for the enactment of Code §401(a)(9)(H) (“2009 RMDs”), and who would have satisfied that requirement by receiving distributions that are (a) equal to the 2009 RMDs or (b) one or more payments in a
series of substantially equal distributions (that include the 2009 RMDs) made at least annually and expected to last for the life (or life expectancy) of the Participant, the joint lives (or joint life expectancy) of the Participant and the
Participant’s Designated Beneficiary, or for a period of at least 10 years (“Extended 2009 RMDs”), will not receive those distributions for 2009 unless the Participant or Beneficiary chooses to receive such distributions.

  

	1.3	Direct Rollovers. Notwithstanding Section 5.14 of the Plan to the contrary, and solely for purposes of applying the direct rollover provisions of the plan
to the above election, the additional distributions in 2009 checked below (if any) will be treated as eligible rollover distributions. However, if no election is made below, a direct rollover will be offered only for distributions that would be
eligible rollover distributions without regard to Code §401(a)(9)(H). 

  

	 	 ̈	2009 RMDs and Extended 2009 RMDs (both as defined in Section 1.1 and 1.2 above). 

 

	 	 ̈	2009 RMDs (as defined in Sections 1.1 and 1.2 above) but only if paid with an additional amount that is an eligible rollover distribution without regard to Code
§401(a)(9)(H). 

 Section 2. 2009 Required Minimum Distributions—Installments (RMDs) 

 

	2.1  x	2009 RMDs Will Be Made Unless the Participant or Beneficiary Elects Not to Receive Them. If this Section 2.1 is checked, then notwithstanding
Section 5.9 of the Plan to the contrary, a Participant or Beneficiary who a Participant or Beneficiary who (a) has elected installment form of distribution and (b) would have been required to receive required minimum distributions for
2009 but for the enactment of Code §401(a)(9)(H) (“2009 RMDs”), and who would have satisfied that requirement by receiving distributions that are (a) equal to the 2009 RMDs or (b) one or more payments in a series of
substantially equal distributions (that include the 2009 RMDs) made at least annually and expected to last for the life (or life expectancy) of the Participant, the joint lives (or joint life expectancy) of the Participant and the Participant’s
Designated Beneficiary, or for a period of at least 10 years (“Extended 2009 RMDs”), will not receive those distributions for 2009 unless the Participant or Beneficiary chooses to receive such distributions. 

 

	2.2   ̈	2009 RMDs Will Not Be Made Unless the Participant or Beneficiary Elects to Receive Them. If this Section is checked then notwithstanding Section 5.9 of the
Plan to the contrary, a Participant or Beneficiary who a Participant or Beneficiary who (a) has elected an installment form of distribution and (b) would have been required to receive required minimum distributions for 2009 but for the
enactment of Code §401(a)(9)(H) (“2009 RMDs”), and (b) who would have satisfied that requirement by receiving distributions that are (a) equal to the 2009 RMDs or (b) one or more payments in a series of substantially
equal distributions (that include the 2009 RMDs) made at least annually and expected to last for the life (or life expectancy) of the Participant, the joint lives (or joint life expectancy) of the Participant and the Participant’s Designated
Beneficiary, or for a period of at least 10 years (“Extended 2009 RMDs”), will not receive those distributions for 2009 unless the Participant or Beneficiary chooses to receive such distributions. 

 

	2.3	Direct Rollovers. Notwithstanding Section 5.14 of the Plan to the contrary and solely for purposes of applying the direct rollover provisions of the Plan to
the above election, the additional distributions in 2009 checked below (if any) will be treated as eligible rollover distributions. However, if no election is made below, a direct rollover will be offered only for distributions that would be
eligible rollover distributions without regard to Code §401(a)(9)(H). 

  

	 	 ̈	2009 RMDs and Extended 2009 RMDs (both as defined in Sections 2.1 and 2.2 above). 

 

	 	 ̈	2009 RMDs (as defined in Sections 2.1 and 2.2 above) but only if paid with an additional amount that is an eligible rollover distribution without regard to Code
§401(a)(9)(11). 

 Section 3. Signature of the Sponsoring Employer Title 

 

									
					
	By	 	/s/ Jacqueline M. Demaria	 		 	Title	 	SVP, HR
	Print Name Jacqueline M. Demaria	 		 	Date 	 	12/6/11

 RMD Amendment 
 2011EX-4.5

 Exhibit 4.5 
 THE WESTERN DIGITAL CORPORATION 401(K) PLAN 
 Effective upon the closing of the
transactions contemplated by that certain Stock Purchase Agreement, dated as of March 7, 2011, by and among Western Digital Corporation, Western Digital Ireland, Ltd., Hitachi, Ltd. and Viviti Technologies Ltd. (the “Effective Date”),
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 
 On the Effective Date, Section 2.2 of the Adoption Agreement,
Plan Data, is hereby deleted in its entirety and shall read as follows: 
 Predecessor Service.
x Service with the following entity or entities will be credited as selected in (a), (b), (c), (d) and (e) below: (this section need only be completed if the Employer
does not maintain the plan of the predecessor employer) 
 Adaptive Data Systems, Inc., Faraday Electronics, Inc., Paradise Systems,
Inc., Verticom, Inc., Atasi, Tandon Corporation, ViaNetix, Inc., Senvid, Inc., Komag, Inc., Silicon Systems, Inc. and HGST America. 
  

	(a)  x	Elective Deferrals, QMACs and QNECs. Service with an entity listed above will be given for eligibility purposes under Section 3.2(a) of the Adoption Agreement.

  

	(b)   ̈	ADP Safe Harbor Contributions. Service with an entity listed above will be given for eligibility purposes under Section 3.2(b) of the Adoption Agreement.

  

	(c)   ̈	ACP Safe Harbor Matching Contributions. Service with an entity listed above will be credited for: (check all that apply) 

 

	 	 ̈	Eligibility purposes under Section 3.2(c) of the Adoption Agreement 

  

	 	 ̈	Vesting purposes under Section 10.3 of the Adoption Agreement 

  

	(d)  x	Non-Safe Harbor Matching Contributions. Service with an entity listed above will be credited for: (check all that apply) 

 

	 	x	Eligibility purposes under Section 3.2(d) of the Adoption Agreement 

  

	 	x	Vesting purposes under Section 10.4 of the Adoption Agreement 

	(e)  x	Non-Safe Harbor Non-Elective Contributions. Service with an entity listed above will be credited for: (check all that apply) 

 

	 	x	Eligibility purposes under Section 3.2(e) of the Adoption Agreement 

  

	 	x	Vesting purposes under Section 10.5 of the Adoption Agreement 

 Second Chance 
 On the Effective Date, Section 8.1(c) of the Adoption
Agreement, Rollover Contributions, is hereby deleted in its entirety and shall read as follows: 
 (c) Rollover Contributions can
also include the following: (check all that apply) 
  

	 	 ̈	Roth Elective Deferrals (Note: Can be checked only if this Plan also permits Roth Elective Deferrals) 

 

	 	 ̈	Voluntary Employee Contributions 

  

	 	 ̈	Mandatory Employee Contributions 

  

	 	x	Participant loans (available for employees of HGST America only) 

  

	 	 ̈	In kind distributions (other than Participant loans) 

 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:	 	1/3/2012

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