FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
SOROS FUND MANAGEMENT LLC
   2. Issuer Name and Ticker or Trading Symbol
QUANTUM CORP /DE/ [QTM] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
888 SEVENTH AVENUE, 33RD FLOOR		 3. Date of Earliest Transaction (Month/Day/Year)
01/28/2015
(Street)

NEW YORK, NY 10106		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number. SEC 1474 (9-02)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
3.5% Convertible Bonds due 2015 $ 4.33 01/28/2015   S     $ 50,000,000   (1)   (1) Common Stock 11,540,015 (2) $ 80,980,000 I See Footnote (3)

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
SOROS FUND MANAGEMENT LLC
888 SEVENTH AVENUE
33RD FLOOR
NEW YORK, NY 10106		     X    
SOROS GEORGE
888 SEVENTH AVENUE,
33RD FLOOR
NEW YORK, NY 10106		     X    
SOROS ROBERT
888 SEVENTH AVENUE
33RD FLOOR
NEW YORK, NY 10106		     X    

Signatures

 /s/ Jay Schoenfarber, as Deputy General Counsel   01/30/2015
**Signature of Reporting Person Date
 /s/ Jay Schoenfarber, as Attorney-in-Fact for George Soros   01/30/2015
**Signature of Reporting Person Date
 /s/ Jay Schoenfarber, as Attorney-in-Fact for Robert Soros   01/30/2015
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The 3.5% Convertible Bonds due 2015 are convertible at any time and mature on November 15, 2015.
(2) The Reporting Persons received $51,000,000 plus accrued and unpaid interest on the 3.5% Convertible Bonds due 2015.
(3) These securities are held for the account of Quantum Partners LP, a Cayman Islands exempted limited partnership ("Quantum Partners"). Soros Fund Management LLC ("SFM LLC") serves as principal investment manager to Quantum Partners. As such, SFM LLC has been granted investment discretion over portfolio investments held for the account of Quantum Partners. George Soros serves as Chairman of SFM LLC and Robert Soros serves as President and Deputy Chairman of SFM LLC.
 
Remarks:
The filing of this statement shall not be deemed an admission that any of the Reporting Persons are the beneficial owner of any securities not held directly for its account for purposes of Section 16 of the Securities Act of 1934, as amended, or otherwise.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.