QUANTUM ANNOUNCES FISCAL FIRST QUARTER EARNINGS CONFERENCE CALL

SAN JOSE, Calif., July 14, 2004 -- Quantum Corp. (NYSE:DSS) will release earnings results for the first quarter of fiscal 2005, ended June 30, 2004, on Tuesday, July 27, 2004 after the close of the market.

Shortly after the news release is issued, Quantum will hold a conference call at 2:00 p.m. PDT. Press and industry analysts are invited to attend in listen-only mode.

Conference Call:
Tuesday, July 27, 2004, 2:00 p.m. PDT

Dial-in Number:
(303) 262-2193 (US & International)

Replay Numbers:
(800) 405-2236 (US)
(303) 590-3000 (International)
Access Code:   11002750
Replay Expiration:  Tuesday, August 3, 2004, 11:59 p.m. PDT

Audio Webcast:
Quantum will provide a live audio webcast of the first quarter earnings conference call beginning Tuesday, July 27 at 2:00 p.m., PDT.  A webcast archive will be available for one year.

Webcast Site:
http://www.quantum.com/investors

About Quantum
Quantum Corp. (NYSE:DSS), founded in 1980, is a global leader in storage, delivering highly reliable backup, recovery and archive solutions that meet demanding requirements for data integrity and availability with superior price/performance and comprehensive service and support.  Quantum is the world's largest supplier of half-inch cartridge tape drives, and its DLTtape™ technology is the standard for tape backup, recovery and archive of business-critical data for the mid-range enterprise. Quantum offers the broadest portfolio of tape autoloaders and libraries and is one of the pioneers in the disk-based backup market, providing solutions that emulate a tape library but are optimized for backup and recovery.  Quantum sales for the fiscal year ended March 31, 2004, were approximately $808 million.  Quantum Corp., 1650 Technology Drive, Suite 800, San Jose, CA 95110, (408) 944-4000, www.quantum.com.

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Quantum, the Quantum logo and the DLTtape logo are trademarks of Quantum Corporation registered in the United States and other countries. DLT and DLTtape and SDLT are trademarks of Quantum Corporation.  All other trademarks are the property of their respective owners.