Document:

EX-4.5

 Exhibit 4.5 

THIRD AMENDMENT 
 TO

 WESTERN DIGITAL CORPORATION 401(K) PLAN 

The Western Digital Corporation 401(k) Plan, originally effective as of October 1, 1984, as presently maintained under an amendment and restatement made
effective as of January 1, 2016, is hereby amended effective as of January 1, 2018, in the following respects: 
 FIRST CHANGE

 Section 14.4b.iii of the Adoption Agreement is amended to provide for In-Plan Roth Rollover
Contributions as follows: 
  

													
	iii.	  	☒	  	In-Plan Roth Rollover Contributions.
			
		  	A.	  	A Participant may elect to make an In-Plan Roth Rollover Contribution of any amount held in his Account (other than amounts attributable to designated Roth contributions)
that is (select all that apply):
					
		  		  	1.	  	☐	  	Eligible for non-hardship withdrawal in accordance with the provisions of Section 26.
						
		  		  		  	a.	  	☐	  	The limitations on withdrawals specified in Section 26 (e.g., limit on number of withdrawals) do not apply to a withdrawal made for purposes of In-Plan Roth Rollover
Contributions.
					
		  		  	2.	  	☒	  	Eligible for non-hardship withdrawal as provided below. The following withdrawal provisions apply solely for purposes of making In-Plan Roth
Rollover Contributions.
						
		  		  		  	a.	  	☒	  	Withdrawal is permitted at any time from the following:
							
		  		  		  		  	i.	  	☒	  	After-Tax Contributions
							
		  		  		  		  	ii.	  	☒	  	Rollover Contributions
							
		  		  		  		  	iii.	  	☐	  	After-Tax Rollover Contributions
							
		  		  		  		  	iv.	  	☐	  	QVECs
						
		  		  		  	b.	  	☒	  	Withdrawal is permitted upon reaching the specified age from the following:
							
		  		  		  		  	i.	  	☐	  	After-Tax Contributions at age                     
							
		  		  		  		  	ii.	  	☐	  	Rollover Contributions at age                     
							
		  		  		  		  	iii.	  	☐	  	After-Tax Rollover Contributions at age                     
							
		  		  		  		  	iv.	  	☒	  	Pre-Tax 401(k) Contributions at age 59 1/2 (3 591⁄2)
							
		  		  		  		  	v.	  	☐	  	Safe Harbor Contributions at age                     
(3 591⁄2)
							
		  		  		  		  	vi.	  	☐	  	Prior Safe Harbor Contributions at age                     
(3 591⁄2)
							
		  		  		  		  	vii.	  	☐	  	Nonelective Contributions at age                     
							
		  		  		  		  	viii.	  	☐	  	Matching Contributions at age                     
							
		  		  		  		  	ix.	  	☐	  	Prior Nonelective Contributions at age                     
							
		  		  		  		  	x.	  	☐	  	Prior Matching Contributions at age                     
							
		  		  		  		  	xi.	  	☐	  	Prior Money Purchase Pension Plan Contributions at age                     
(3 62)
					
		  		  	3.	  	☐	  	Distributable to the Participant following severance from employment.
						
		  		  		  	a.	  	☐	  	A Participant who receives actual distribution from the Plan following severance may make a Participant rollover of the distributed amounts within 60 days of the distribution and it will be treated as an In-Plan Roth Rollover Contribution.

  
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		  	B.	  	☐	  	Surviving Spouses and current or former Spouses who are alternate payees under a QDRO may make In-Plan Roth Rollover Contributions upon the same terms as Participants.

 Section 24.1a of the Adoption Agreement is updated to reflect that In-Plan
Roth Rollover Contributions are excluded from loan calculation and Redemption by reference to the loan policy as follows: 
  

	24.1	 AVAILABILITY 

 

											
	a.	  	☒	  	The Plan permits Participant loans. Loans are permitted with the following restrictions, as applicable: (select all that apply)
				
		  	i.	  	☐	  	No restrictions on Sub-Accounts available for loans
				
		  	ii.	  	☒	  	Loans are not available from following portions of Participant’s Account:
			
		  		  	Note: If the Plan includes QVECs, loans may not be made from QVEC Sub-Accounts and such Sub-Accounts are not included in
determining the maximum amount of a loan.
					
		  		  	A.	  	☒	  	Roth 401(k) Contributions Sub-Account.
						
		  		  		  	1.	  	☐	  	The balance of the Roth 401(k) Contributions Sub-Account is also excluded in determining maximum permissible loan amount
					
		  		  	B.	  	☒	  	Other specified Sub-Accounts: Designated Roth Rollover Contributions, In-Plan Roth Rollover Contributions and QNECs
						
		  		  		  	1.	  	☐	  	The balance of the other Sub-Accounts is also excluded in determining maximum permissible loan amount
				
		  	iii.	  	☐	  	Loans are not permitted to individuals with Rollover Contributions under the Plan, but who have not met the requirements to become an Eligible Employee.

 A new Addendum E, in the form attached to this amendment, is added at the end of the Adoption Agreement to implement in-plan Roth conversions in compliance with Code Section 402A(c)(4)(E), as added by the American Taxpayer Relief Act of 2012 (“ATRA”) and interpreted by applicable guidance. 

FINAL CHANGE 
 Section 25 of the
Adoption Agreement is amended to limit the number of hardship withdrawals to 2 per calendar year as follows: 
 SECTION 25. HARDSHIP WITHDRAWALS 

 

	25.5	 OPTIONAL LIMITATIONS ON HARDSHIP
WITHDRAWALS. 

  

							
	a.	  	☒	  	Minimum Hardship Withdrawal Amount. The minimum hardship withdrawal amount is: $500
				
		  	i.	  	☐	  	If less, Participant may withdraw 100% of his withdrawable interest
			
	b.	  	☐	  	Suspension of Further Hardship Withdrawals. The suspension period will last                      months
			
	c.	  	☒	  	Limit Number of Hardship Withdrawals. The number of hardship withdrawals a Participant may receive during the calendar year is limited to: 2

  
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 EXECUTED AT Irvine, CA, this 22nd day of November, 2017.

  

			
	Western Digital Corporation
		
	By:	 	 /s/ Jacqueline DeMaria

	Title:	 	 EVP, Chief Human Resources Officer

 ADDENDUM E 

ATRA IN-PLAN ROTH CONVERSIONS 

INTERIM COMPLIANCE AMENDMENT 
  

	E.1	 IN-PLAN ROTH
ROLLOVERS OF OTHERWISE NON-DISTRIBUTABLE AMOUNTS 

 

															
	a.	  	The provisions of this Addendum provide for In-Plan Roth Rollover Contributions with respect to amounts that are not otherwise distributable, as permitted under Code
Section 402A(c)(4)(E), as added by the American Taxpayer Relief Act of 2012 (“ATRA”) and interpreted by IRS Notice 2010-84 and IRS Notice 2013-74. This
Addendum is intended to comply in good faith with the provisions of Code Section 402A(c)(4) and the applicable guidance.
			
		  		  	Note: In-Plan Roth Rollover Contributions with respect to amounts that are otherwise distributable under the terms of the Plan are governed by the provisions of
the Adoption Agreement other than this Addendum.
				
		  	i.	  	☒	  	Subject to any elections in A., B., C., E., F., or G. below, a Participants may elect, in accordance with rules prescribed by the Administrator, to make an In-Plan Roth Rollover
Contribution of vested amounts held in his Account that are not otherwise distributable in accordance with the terms of the Plan (“non-distributable amounts”). Any such election shall be irrevocable.
In-Plan Roth Rollover Contributions of non-distributable amounts shall be subject to the provisions of this Addendum.
				
		  		  	A.	  	In-Plan Roth Rollover Contributions may be made of:
						
		  		  		  	1.	  	☐	  	all non-distributable amounts
						
		  		  		  	2.	  	☒	  	only the non-distributable amounts specified below
								
		  		  		  		  		  	a.	  	☒	  	After-Tax Contributions
								
		  		  		  		  		  	b.	  	☒	  	Rollover Contributions
								
		  		  		  		  		  	c.	  	☐	  	After-Tax Rollover Contributions
								
		  		  		  		  		  	d.	  	☒	  	Pre-Tax 401(k) Contributions
								
		  		  		  		  		  	e.	  	☐	  	Regular Matching Contributions
								
		  		  		  		  		  	f.	  	☐	  	Additional Discretionary Matching Contributions
								
		  		  		  		  		  	g.	  	☐	  	True-Up Matching Contributions

  
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		  		  		  		  		  	h.	  	☐	  	Prior Matching Contributions
								
		  		  		  		  		  	i.	  	☐	  	Standard Nonelective Contributions
								
		  		  		  		  		  	j.	  	☐	  	Additional Discretionary Nonelective Contributions
								
		  		  		  		  		  	k.	  	☐	  	Prior Nonelective Contributions
								
		  		  		  		  		  	l.	  	☐	  	Safe Harbor Contributions
								
		  		  		  		  		  	m.	  	☐	  	Prior Safe Harbor Contributions
								
		  		  		  		  		  	n.	  	☐	  	Prior Money Purchase Pension Plan Contributions
								
		  		  		  		  		  	o.	  	☐	  	Prevailing Wage Law Contributions
								
		  		  		  		  		  	p.	  	☐	  	QNECs
								
		  		  		  		  		  	q.	  	☐	  	QMACs
								
		  		  		  		  		  	r.	  	☐	  	QVECs
								
		  		  		  		  		  	s.	  	☐	  	the following contribution sources:                     
						
		  		  		  	B.	  	☒	  	Regardless of the election in A above, contributions being used as collateral for an outstanding loan balance may not be rolled over pursuant to the provisions of this Addendum
						
		  		  		  	C.	  	☒	  	In-Plan Roth Rollover Contributions of non-distributable amounts may only be made from Sub-Accounts
that are 100% vested
						
		  		  		  	D.	  	☐	  	Surviving Spouses and current or former Spouses who are alternate payees under a QDRO may make In-Plan Roth Rollover Contributions of
non-distributable amounts upon the same terms as Participants.
						
		  		  		  	E.	  	☐	  	A Participant may not make an In-Plan Roth Rollover Contribution of less than: $            
							
		  		  		  		  	1.	  	☐	  	A Participant’s simultaneous In-Plan Roth Rollover Contribution of otherwise distributable amounts is included in determining whether the above minimum is met.
						
		  		  		  	F.	  	☐	  	A Participant’s In-Plan Roth Rollover Contribution may not exceed: $             per rollover.
							
		  		  		  		  	1.	  	☐	  	A Participant’s simultaneous In-Plan Roth Rollover Contribution of otherwise distributable amounts is included in applying the above limitation.
						
		  		  		  	G.	  	☐	  	The Plan limits the number of In-Plan Roth Rollover Contributions a Participant may make during a specified period.
							
		  		  		  		  	1.	  	☐	  	Maximum number of In-Plan Roth Rollover Contributions:
                    
							
		  		  		  		  	2.	  	☐	  	Period over which the maximum is applied:
								
		  		  		  		  		  	a.	  	☐	  	each calendar month
								
		  		  		  		  		  	b.	  	☐	  	each Plan Year
								
		  		  		  		  		  	c.	  	☐	  	each calendar year
								
		  		  		  		  		  	d.	  	☐	  	each Plan Year quarter

  
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		  		  		  		  		  	e.	  	☐	  	each calendar quarter
								
		  		  		  		  		  	f.	  	☐	  	Other period:                     
							
		  		  		  		  	3.	  	☐	  	A Participant’s In-Plan Roth Rollover Contributions of otherwise distributable amounts are included in applying the above limitation.
								
		  		  		  		  		  	a.	  	☐	  	Simultaneous rollovers of both distributable and non-distributable amounts are treated as a single In-Plan Roth Rollover Contribution for purposes of
the above limitation.
					
		  		  		  	H.	  	In-Plan Roth Rollover Contributions attributable to non-distributable amounts shall be loanable and lienable to the same extent as In-Plan Roth Rollover Contributions attributable to otherwise distributable amounts.
					
		  		  		  	I.	  	In-Plan Roth Rollover Contributions attributable to non-distributable amounts continue to be subject to the same distribution restrictions
that applied prior to conversion. For example, Roth In-Plan Rollover Contributions attributable to Pre-Tax 401(k) Contributions continue to be subject to the
distribution restrictions applicable to Pre-Tax 401(k) Contributions under Code Section 401(k)(2)(B) and the Plan.
					
		  		  		  	J.	  	An in-Plan Roth rollover will not eliminate any Code Section 411(d)(6) protected distribution rights attributable to the amount being rolled over.

  

	E.1	 AMENDMENT TO SBJPA
IN-PLAN ROTH ROLLOVERS OF DISTRIBUTABLE AMOUNTS 

 

									
	a.	 	A new Section 14.4b.iii.C is added at the end of Section 14.4b.iii of the Adoption Agreement to provide as follows:
					
		 	          	 		  	C.	  	In-Plan Roth Rollover Contributions of withdrawable amounts may only be made from Sub-Accounts that are 100% vested. (This option has only been pre-approved for withdrawable amounts provided (i) this withdrawal limitation is selected and (ii) the withdrawal limitations are retained. This option may be selected under
other conditions as a modification to the pre-approved document.)

  
 5EX-4.6

 Exhibit 4.6 

CLAIMS PROCEDURES COMPLIANCE AMENDMENT TO 

DOCUMENT AGILITY, INC. VOLUME SUBMITTER 401(K) SAVINGS/PS PLAN 

ADOPTION AGREEMENT NO. 001 

WITH 
 BASE PLAN DOCUMENT
NO. 01 
 Document Agility, Inc., as the volume submitter practitioner, hereby adopts the attached compliance amendment for purposes of complying the
Document Agility, Inc. (formerly the PDS PremierTM) Volume Submitter 401(k) Savings/PS Plan Adoption Agreement No. 001 and Base Plan Document No. 01, advisory letter J593640a (the
“Specimen Plan”) and all plans generated using the Specimen Plan with respect to which the volume submitter practitioner retains amendment authority under the provisions of Revenue Procedure 2007-44
and 2011-49, with final Department of Labor regulations applicable to disability claims under pension plans. The provisions of this amendment are effective for disability claims filed on or after April 1,
2018 (or such later date as may be prescribed by the Secretary under subsequent guidance or ruling). 
 Capitalized terms used in this amendment refer to
those terms as defined and used in the Specimen Plan. If the Plan has been modified to substitute a different term for the defined term used in the Specimen Plan, the provisions of the amendment shall be deemed to apply as if reference were made to
the modified term used in the Plan. 
 References to provisions by Section number or title are to the provisions associated with the Section number or title
used in the Specimen Plan. If the Plan has been modified in such a way that the Section numbers or titles have been changed, references are to the provisions in the Plan that are associated with the Section numbers or titles in the Specimen Plan.

 Adopted this 26th day of January, 2018. 
  

			
	By:	 	 /s/ Ron MacInnis

		 	Ron MacInnis

  
 1 

 COMPLIANCE AMENDMENT TO 

DOCUMENT AGILITY, INC. VOLUME SUBMITTER 401(K) SAVINGS/PS PLAN 

BASE PLAN DOCUMENT NO. 01 
 Effective for
disability claims filed on or after April 1, 2018 (or such later date as may be prescribed by the Secretary under subsequent guidance or ruling), the Document Agility, Inc. (formerly the PDS
PremierTM) Volume Submitter 401(k) Savings/PS Plan Base Plan Document No. 01, advisory letter J593640a, is amended in response to final Department of Labor regulations applicable to
disability claims under pension plans, as provided below: 
 1. Section 18.4 of the Base Plan Document is amended to provide as follows: 

18.4 Claims Review Procedure 
 The requirements of the DOL
Regulations, as described in this Section and in the more detailed Plan claims procedures, shall control whenever a claimant (i) files a claim for benefits under the Plan that is denied, in whole or in part or (ii) seeks a remedy under any
provision of ERISA or other applicable law in connection with any issue regarding his benefit under the Plan and such claim is denied, in whole or in part. 
  

	(a)	 Special Definitions. For purposes of this Section, the following terms shall have the following
meanings: 

  

	 	(1)	 A “claimant” means any person who either (i) makes a claim for benefits under the Plan or
(ii) seeks a remedy under any provision of ERISA or other applicable law in connection with any error regarding his benefit under the Plan. 

  

	 	(2)	 The “DOL Regulations” mean Department of Labor Regulations
Section 2560.503-1. 

  

	 	(3)	 The “Plan claims procedures” mean the procedures established by the Administrator to review claims
under the Plan, as described in the summary plan description. 

 References to the Administrator in this section include
any other claims adjudicator acting on behalf of the Administrator. 
  

	(b)	 Standard Claims Review: The provisions of this Section 18.4(b) shall apply to any claim that is not
subject to review under the provisions of Section 18.4(c) below. 

  

	 	(A)	 Initial Review. Whenever the Administrator decides for whatever reason to deny, whether in whole or in
part, a claim for benefits filed by a claimant, the Administrator shall transmit to the claimant a written notice of its decision within 90 days of the date the claim was filed, unless the claimant voluntarily agrees to a longer review period.

  

	 	(B)	 Extension of Initial Review Period. If special circumstances require an extension, the Administrator
will notify the claimant before the end of the initial review period that additional review time is necessary. The Administrator cannot extend the review period beyond an additional 90 days, unless the claimant voluntarily agrees to a longer
extension. 

  

	 	(C)	 Denial Notice. The notice denying a claimant’s claim shall be written in a manner calculated to be
understood by the claimant and shall contain the information required under the DOL Regulations and the Plan claims procedures. 

  

	 	(2)	 Appeal of Adverse Benefit Determination. Within the 60-day
period beginning on the date the claimant receives notice of the adverse benefit determination, the claimant or his authorized representative may appeal the determination by filing a written request with the Administrator. The request must contain
the information identified in the Plan claims procedures. 

  

	 	(3)	 Review on Appeal. If a claimant timely files an appeal in accordance with the provisions of
Section 18.4(b)(2), the Plan shall provide a full and fair review of the adverse benefit determination. Within 60 days of the date the Administrator receives the claimant’s appeal (or, if special circumstances require an extension, within
120 days of that date; provided that the delay and the reasons for the delay are communicated to the claimant within the initial 60-day period), the Administrator shall render its decision on appeal to the
claimant. The notice denying a claimant’s appeal shall be written in a manner calculated to be understood by the claimant and shall contain the information required under the DOL Regulations and the Plan claims procedures.

  

	(c)	 Disability Claims Review: The provisions of this Section 18.4(c) shall apply to any claim that
requires a determination under the Plan as to whether or not a claimant is disabled. The provisions of this Section shall not apply if the disability determination is made by a party outside the Plan for reasons other than determining eligibility
for benefits under the Plan, such as where disability under the Plan is determined based solely on whether the claimant is entitled to disability benefits under the Social Security Act or under the Employer’s long term disability plan.

  

	 	(1)	 Initial Review. Whenever the Administrator decides for whatever reason to deny, whether in whole or in
part, a claim for benefits filed by a claimant, the Administrator shall transmit to the claimant a written notice of its decision within 45 days of the date the claim was filed, unless the claimant voluntarily agrees to a longer review period.

  
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	 	(A)	 Extension of Initial Review Period for Special Circumstances. If special circumstances outside the
control of the Administrator require an extension, the Administrator will notify the claimant before the end of the initial review period that additional review time is necessary. Unless the Administrator requires additional information from the
Participant to process the disability claim, the review period cannot be extended beyond an additional 30 days, unless the claimant voluntarily agrees to a longer review period. If the Administrator requires additional information from the
Participant to process the disability claim, the Participant must respond within 45 days of the date the notice is provided and the review period may be extended accordingly. If special circumstances require a further extension, the Administrator
will notify the claimant before the end of the initial 30-day extension that additional review time is necessary and the date by which a final decision is expected. 

 

	 	(B)	 Contents of Denial Notice. The notice denying a claimant’s claim for a disability benefit shall be
written in a manner calculated to be understood by the claimant, shall be provided in a culturally and linguistically appropriate manner, and shall contain the information required under the DOL Regulations and the Plan claims procedures.

  

	 	(2)	 Appeal of Adverse Benefit Determination. Within the 180-day
period beginning on the date the claimant receives notice of the adverse benefit determination, the claimant or his authorized representative may appeal the determination by filing a written request with the Administrator. The request must contain
the information identified in the Plan claims procedures. 

  

	 	(3)	 Review on Appeal. If a claimant timely files an appeal in accordance with the provisions of
Section 18.4(c)(2), the Plan shall provide a full and fair review of the adverse benefit determination in accordance with the Plan claims procedures. Within 45 days of the date the Administrator receives the claimant’s appeal, the
reviewing fiduciary shall render its decision on appeal to the claimant. If the reviewing fiduciary decides for whatever reason to deny, whether in whole or in part, a claimant’s appeal of an adverse benefit determination, the reviewing
fiduciary’s decision shall be written in a manner calculated to be understood by the claimant, shall be provided in a culturally and linguistically appropriate manner, and shall contain the information required under the DOL Regulations and the
Plan claims procedures. 

 If the Plan fails to comply with the provisions of this Section or with the Plan claims procedures, such
failure shall not constitute a failure to observe the written provisions of the Plan. However, in the event of such a failure, unless the failure is a minor one, the Plan may not assert as a defense in a later civil action that the claimant did not
exhaust administrative remedies. 
 2. Section 18.6 of the Base Plan Document is amended to provide as follows: 

18.6 Exhaustion of Remedies and Limitation on Filing Civil Action 

No civil action for benefits under the Plan shall be brought unless and until the aggrieved person has: 

 

	(a)	 submitted a timely claim for benefits in accordance with the provisions of the Plan; been notified by the
Administrator that the claim has been denied (or such claim is deemed denied); 

  

	(b)	 filed a written appeal of the claim in accordance with Section 18.4(b)(2) or 18.4(c)(2), as applicable;

  

	(c)	 been notified in writing of an adverse benefit determination on appeal; and 

 

	(d)	 filed the civil action within 12 months of the date he receives a final adverse determination of his claim on
appeal. 

 Notwithstanding the foregoing, an aggrieved person who fails to engage in or exhaust the claims and review procedures
established under the Plan before bringing a claim for benefits under the Plan, based on a claim of futility or any other grounds, must file such action within 12 months of the first date he or she allegedly became entitled to the benefits at issue,
based on the facts or conduct he or she alleges give rise to the claim. The foregoing shall not relieve a person from engaging in and exhausting the claims and review procedures established under the Plan. A claimant who fails to file a civil action
within the applicable 12-month period will lose all rights to bring a civil action thereafter. 

  
 3

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