ADIC to Present at Upcoming Investor Conferences.

REDMOND, Wash. -- Advanced Digital Information Corporation (Nasdaq:ADIC) today announced that the Company will participate in two upcoming investor conferences. Jon Gacek, Chief Financial Officer, will make a presentation regarding the Company's products and strategy at the Adams, Harkness & Hill 24th Annual Summer Seminar in Boston and at the Baird 2004 Small Cap Conference in New York. The presentations will be available via webcasts through the Company's website at www.adic.com/ir.

August 3, 2004 -- 11:00 a.m. ET/8:00 a.m. PT
    Adams, Harkness & Hill 24th Annual Summer Seminar
    Marriott Long Wharf Hotel, Boston, MA

    August 4, 2004 -- 3:50 p.m. ET/12:50 p.m. PT
    Baird 2004 Small Cap Conference
    Pierre Hotel, New York, NY

About ADIC(R)

Advanced Digital Information Corporation (Nasdaq:ADIC) is a leading provider of Intelligent Storage(TM) solutions to the open systems marketplace. ADIC is the world's largest supplier of automated tape systems using the drive technologies most often employed for backing up open system, client-server networks.(a) The Company's data management software, storage networking appliances, and disk-to-tape data protection solutions provide IT managers innovative tools for storing, managing and protecting their most valuable digital assets in a variety of disk and tape environments. ADIC storage products are available through a worldwide sales force and a global network of resellers and OEMs, including Cray, Dell, EMC, Fujitsu-Siemens, HP, IBM and Sun. Further information about ADIC is available at www.adic.com.

(a) Market Share: Gartner Dataquest, Tape Automation Systems Market Shares, 2003, F. Yale, April 2004. ADIC and Scalar are registered trademarks and Intelligent Storage and iPlatform are trademarks of Advanced Digital Information Corporation. All other trade or service marks mentioned in this document should be considered the property of their respective owners.