[Quantum Letterhead]

May 1, 2017

Mr. Adalio T. Sanchez
[Address]

Dear Adalio:

We are pleased to offer you the opportunity to serve on the Board of Directors
(the “Board”) of Quantum Corporation (“Quantum”). Your appointment was approved
today by the Quantum Board, with an effective date of May 4, 2017.

Under the current Board compensation program, your Board retainer will be
$50,000 per annum. Additionally, as a member of the Leadership and Compensation
Committee, you will receive an additional cash retainer of $10,000 per annum.
These retainers are paid in cash, generally in quarterly installments, and will
be prorated for partial periods of service. Quantum will also reimburse you for
any reasonable travel or incidental expenses associated with performing your
duties as a Board member.

We will recommend to the Leadership and Compensation Committee that restricted
stock units (RSUs) with a total value of $33,333 be awarded to you, calculated
using a company stock value of the higher of $8 or the current stock price. The
number of RSUs to be awarded will be determined at the time of award based on
the company’s closing stock price on the date of the Leadership and Compensation
Committee’s approval, which occurs on the first business day of every month.
These RSUs will vest 100% on the date of the Company’s next annual stockholder
meeting, anticipated to occur on August 31, 2017. Once the RSUs have been
approved, you will receive documentation from E*Trade, Quantum’s Stock
Administrator, within two (2) months from your start date. If you remain a Board
member, you will receive an annual stock grant thereafter, currently set at a
total value of $100,000 per annum. Details regarding the annual stock program
are subject to change.

Lastly, we are pleased to offer you the opportunity to participate in Quantum’s
Deferred Compensation Program. If you are interested in further information
about this program, please let us know and we will forward it to you.

To confirm your acceptance of our offer, please sign one copy of this letter,
complete the enclosed documents, and return them to Shawn Hall via email at
shawn.hall@quantum.com or by mail to: Shawn Hall, Quantum Corporation, 224
Airport Parkway, Suite 550, San Jose, CA 95110.

Please contact me if you have any questions. Welcome to Quantum and I look
forward to working with you.

Sincerely,

/s/ Jon Gacek        
President & CEO    
Quantum Corporation    
[phone number]    
            

I understand and accept the terms of this agreement and agree to comply with all
Quantum and Board policies and procedures, including those described in
Quantum’s Business Conduct and Ethic’s Policy, Section 16 Policy, Insider
Trading Policy, and Corporate Governance Principles.

Signed: /s/ Adalio T. Sanchez___________________________    Date:
5/1/2017________________
Adalio T. Sanchez

Enclosures:
Director Change in Control Agreement    

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Director Indemnification Agreement     
The High Road: Quantum’s Business Conduct & Ethics Policy
Section 16 Policy Documentation
Insider Trading Policy
Corporate Governance Principles
EFT Form
W-9

cc:     Compensation
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