    <SEC-DOCUMENT>0001193125-19-268540-index.html : 20191016
    <SEC-HEADER>0001193125-19-268540.hdr.sgml : 20191016
    <ACCEPTANCE-DATETIME>20191016163407
    ACCESSION NUMBER:		0001193125-19-268540
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		5
    CONFORMED PERIOD OF REPORT:	20191113
    FILED AS OF DATE:		20191016
    DATE AS OF CHANGE:		20191016
    EFFECTIVENESS DATE:		20191016

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			QUANTUM CORP /DE/
    		CENTRAL INDEX KEY:			0000709283
    		STANDARD INDUSTRIAL CLASSIFICATION:	COMPUTER STORAGE DEVICES [3572]
    		IRS NUMBER:				942665054
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			0331

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-13449
    		FILM NUMBER:		191153097

    	BUSINESS ADDRESS:
    		STREET 1:		224 AIRPORT PARKWAY
    		STREET 2:		SUITE 550
    		CITY:			SAN JOSE
    		STATE:			CA
    		ZIP:			95110
    		BUSINESS PHONE:		408 944 4000

    	MAIL ADDRESS:
    		STREET 1:		224 AIRPORT PARKWAY
    		STREET 2:		SUITE 550
    		CITY:			SAN JOSE
    		STATE:			CA
    		ZIP:			95110
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>d783126ddef14a.htm
    <DESCRIPTION>DEFINITIVE PROXY STATEMENT
    <TEXT>
    Document 1 - file: d783126ddef14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>g783126g23c09.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: g783126g23c09.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>g783126g33t86.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: g783126g33t86.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>g783126g89s41.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: g783126g89s41.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>g783126g96o13.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: g783126g96o13.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>