Exhibit 99.1

QUANTUM CORPORATION REPORTS FISCAL 2012 AND FOURTH QUARTER RESULTS

• Fiscal year revenue of $652 million, with branded growth of 2% over fiscal 2011
• Total disk systems and software revenue of $137 million in fiscal 2012 and $38 million in fourth quarter – record branded disk systems and software sales, up 18% for the year and 28% for the quarter over respective prior year periods
• Third consecutive year of GAAP operating profit and ninth straight year of non-GAAP operating profit
• Year of continued product innovation, with enhancements to entire DXi deduplication portfolio, launch of StorNext big data appliance family and extension of data protection leadership into virtual and cloud environments

SAN JOSE, Calif., May 9, 2012 – Quantum Corp. (NYSE:QTM), a proven global expert in data protection and big data management, today reported results for fiscal 2012 (FY12) and the fourth quarter (FQ4’12), ended March 31, 2012. Revenue for the year totaled $652 million, down 3 percent from fiscal 2011 (FY11), primarily due to expected decreases in OEM deduplication software revenue and royalty revenue. For FQ4’12, Quantum reported $160 million in revenue, a 3 percent decrease from the same period last year (FQ4’11). Branded revenue, which represented 81 percent of total non-royalty revenue for the year, grew 2 percent over FY11. Branded disk systems and software sales, including related service revenue, were a key contributor to this year-over-year growth, increasing 18 percent for FY12 and 28 percent for the fourth quarter.

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Quantum reported a GAAP net loss for FY12 of $9 million (4 cents per diluted share), compared to net income of $5 million in the prior year. On a non-GAAP basis, Quantum generated $30 million in net income for the year (12 cents per diluted share), down from $49 million in FY11. For FQ4’12, Quantum had a GAAP net loss of $11 million (5 cents per diluted share), compared to a net loss of $2 million in FQ4’11. Non-GAAP net income for the quarter was $1 million (less than 1 cent per diluted share), down from $10 million in the same quarter of FY11. The year-over-year declines were largely due to expected reductions in OEM deduplication software revenue and royalty revenue for FY12 and decreased tape automation systems revenue for FQ4’12. Quantum’s results also reflected a decision to increase sales and marketing spending in the fourth quarter to provide a stronger foundation for driving overall growth from the start of the new fiscal year. Finally, Quantum’s GAAP results included a $2.3 million loss in FQ4’12 related to the refinancing of its senior debt, which is expected to save the company approximately $2 million in annual interest expense and bank fees, beginning with the current fiscal year.

“The March quarter capped off a year of strong performance in key growth areas,” said Jon Gacek, president and CEO of Quantum. “In fiscal 2012, we increased overall branded revenue for the second consecutive year, with record revenues from both branded DXi^® and branded StorNext^® sales. It was also a year of continued technology and product innovation, as we enhanced our entire DXi product line, introduced a series of new StorNext appliances and added new features to our Scalar tape libraries. Shortly after acquiring Pancetera Software last June, we also launched Quantum vmPRO™ virtual server protection solutions and laid the groundwork for our recently announced cloud-based data protection platform.

“As we enter the new fiscal year, we are well-positioned to drive overall revenue growth, with industry-leading technology and products in some of the hottest segments of the storage market, including deduplication, virtualization and cloud services. We also are continuing to build on this leadership, as demonstrated by today’s announcement regarding a new category of solutions that uniquely address the physical storage challenges in big data management and cloud environments. All of this reflects Quantum’s transformation over the last few years and our ability to address a much broader range of customer needs in data protection and big data management with highly differentiated solutions optimized to deliver greater business value.”

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Quantum ended FY12 with $55 million in total cash and cash equivalents and $184 million in total debt. For the full year, the company generated $46 million in cash from operations and reduced its total debt by $55 million.

Outlook

• Total revenue growth over FY12.
• GAAP and non-GAAP gross margin rates in the mid-40 percent range.
• GAAP and non-GAAP operating expenses of $280 million to $285 million and $255 million to $260 million, respectively.
• Interest expense of $8 million and taxes of $4 million.

• Year-over-year revenue growth to approximately $155 million.
• GAAP gross margin rate of approximately 41 percent and non-GAAP gross margin rate of 42 percent.
• GAAP and non-GAAP operating expenses of $70 million to $72 million and $63 million to $65 million, respectively.
• Interest expense of $2 million and taxes of $1 million.

Business Highlights

• Quantum launched a new, all-virtual software platform to help customers take advantage of cloud-based data protection through a highly optimized, flexible approach that overcomes the limitations of other cloud offerings. Centered on Quantum vmPRO technology and a new virtual deduplication appliance, DXi V1000, this platform is a key component of Xerox’s cloud backup and disaster recovery (DR) services announced earlier this year. It also serves as the foundation of a multi-faceted plan to make the benefits of Quantum’s cloud-optimized technology available through other public and private cloud services, including new Quantum-branded offerings.

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• Storage magazine and SearchStorage.com named Quantum’s vmPRO 4000 virtual server protection appliance as “2011 Backup Hardware Product of the Year” in their annual awards, reflecting the company’s success in extending its data protection leadership beyond physical environments. The vmPRO 4000 was recognized for superior innovation, performance, ease of integration and use, manageability, functionality and value.
• The DXi6700 family of midrange disk backup and deduplication appliances was named Storage Product of the Year at the 2012 Network Computing Awards in London. The awards recognize the hardware, software and services which have most impressed the readers of Network Computing, the UK’s longest established computer networking publication. In addition, the DXi6700 was a finalist in the Storage magazine/SearchStorage.com Product of the Year awards.
• Quantum began shipping its StorNext G300 Gateway appliances which simplify and leverage high-speed networking technologies to provide virtual, highly available access over an IP connection to large data sets managed by the high-performance StorNext file system. In addition, the company added the new StorNext QS2400 Storage System to its primary disk product line, further building out its StorNext appliance offerings.
• Quantum also prepared for launch of its Scalar LTFS (Linear Tape File System) appliance, announced shortly after the quarter ended. Scalar LTFS, which is based on the LTFS open-standard for content formatting, offers new modes of portability and user accessibility for archived content on LTO tape. Because it works with existing application and file system tools, LTFS-based content can be easily managed, transported and accessed for long-term data protection and archival storage.

Conference Call and Audio Webcast Notification

Quantum will hold a conference call today, May 9, 2012, at 2:00 p.m. PDT, to discuss its fiscal fourth quarter and full year results. Press and industry analysts are invited to attend in listen-only mode. Dial-in number: (480) 629-9835 (U.S. & International). Quantum will provide a live audio webcast of the conference call beginning today, May 9, 2012, at 2:00 p.m. PDT. Site for the webcast and related information: http://www.quantum.com/investors.

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About Quantum

Quantum Corp. (NYSE:QTM) is a proven global expert in data protection and big data management that provides a unique combination of intelligent storage solutions and unmatched value for traditional, virtual and cloud environments. From small businesses to multinational enterprises, more than 50,000 customers trust Quantum to help cost effectively manage data growth and extract the full value from their digital assets. The company’s offerings include: DXi^®-Series disk-based deduplication and replication systems for fast backup and restore, Quantum vmPRO™ solutions for protecting virtual machine data, Scalar^® tape automation products for disaster recovery and long-term data retention, and StorNext^® big data management software and appliances for high-performance file sharing and archiving. 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, DXi, Scalar, StorNext and vmPRO are either registered trademarks or trademarks of Quantum Corporation and its affiliates in the United States and/or other countries. All other trademarks are the property of their respective owners.

“Safe Harbor” Statement under the U.S. Private Securities Litigation Reform Act of 1995: This press release contains “forward-looking” statements within the meaning of the Private Securities Litigation Reform Act of 1995. Specifically, without limitation, our statement regarding driving revenue growth, our statements regarding new product offerings and all of our statements under the “Outlook” section are forward-looking statements within the meaning of the Safe Harbor. All forward-looking statements in this press release are based on information available to Quantum on the date hereof. These statements involve known and unknown risks, uncertainties and other factors that may cause Quantum’s actual results to differ materially from those implied by the forward-looking statement. More detailed information about these risk factors, and additional risk factors, are set forth in Quantum’s periodic filings with the Securities and Exchange Commission, including, but not limited to, those risks and uncertainties listed in the section entitled “Item 1A. Risk Factors,” in Quantum’s Annual Report on Form 10-K filed with the Securities and Exchange Commission on June 14, 2011 and Quantum’s Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on February 9, 2012. Quantum expressly disclaims any obligation to update or alter its forward-looking statements, whether as a result of new information, future events or otherwise.

Use of Non-GAAP Financial Measures

Quantum believes that the non-GAAP financial measures disclosed above provide useful and supplemental information to investors regarding its quarterly financial performance. Quantum management uses these non-GAAP financial measures internally to understand, manage and evaluate the company’s business results and make operating decisions. For instance, Quantum management often makes decisions regarding staffing, future management priorities and how the company will direct future operating expenses on the basis of non-GAAP financial measures. In addition, compensation of our employees is based in part on the performance of our business based on non-GAAP operating income.

The non-GAAP financial measures used in this press release exclude the impact of acquisition expenses, amortization of intangibles, loss on debt extinguishment, restructuring charges, senior debt amendment fees and share-based compensation expense for the following reasons:

Acquisition Expenses
The acquisition expenses were those expenses incurred to acquire Pancetera, Inc. and are not part of Quantum’s future core operations.

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Amortization of Intangible Assets
This includes acquired intangibles such as purchased technology and customer relationships in connection with prior acquisitions. These expenses are not factored into management’s evaluation of potential acquisitions or Quantum’s performance after completion of the acquisitions because they are not related to Quantum’s core operating performance. In addition, the frequency and amount of such charges can vary significantly based on the size and timing of acquisitions and the maturities of the businesses being acquired. Excluding acquisition-related charges from non-GAAP measures provides investors with a basis to compare Quantum against the performance of other companies without the variability caused by purchase accounting.

Loss on Debt Extinguishment
The loss on debt extinguishment relates to specific debt refinancing actions and is not part of Quantum’s future core operations.

Restructuring Charges
Restructuring charges primarily relate to expenses associated with changes to Quantum’s operating structure. Restructuring charges are excluded from non-GAAP financial measures because they are not considered core operating activities. Although Quantum has engaged in various restructuring activities in the past, each has been a discrete event based on a unique set of business objectives. Management believes that it is appropriate to exclude restructuring charges from Quantum’s non-GAAP financial measures, as it enhances the ability of investors to compare Quantum’s period-over-period operating results from continuing operations.

Senior Debt Amendment Fees
The senior debt amendment fees relate to a specific amendment fee and are not part of Quantum’s future core operations.

Share-Based Compensation Expense
Share-based compensation expense relates primarily to equity awards such as stock options and restricted stock units. Share-based compensation is a non-cash expense that varies in amount from period to period and is dependent on market forces that are often beyond Quantum’s control. As a result, management excludes this item from Quantum’s internal operating forecasts and models. Management believes that non-GAAP measures adjusted for share-based compensation provide investors with a basis to measure Quantum’s core performance against the performance of other companies without the variability created by share-based compensation as a result of the variety of equity awards used by other companies and the varying methodologies and assumptions used.

Non-GAAP financial measures should not be considered as a substitute for, or superior to, measures of financial performance prepared in accordance with GAAP. They are limited in value because they exclude charges that have a material impact on the company’s reported financial results and, therefore, should not be relied upon as the sole financial measures to evaluate the company. The non-GAAP financial measures are meant to supplement, and be viewed in conjunction with, GAAP financial measures. Investors are encouraged to review the reconciliation of the non-GAAP financial measures to their most directly comparable GAAP financial measures as provided in the tables accompanying this press release.

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QUANTUM CORPORATION
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
(In thousands, except per share amounts)
(Unaudited)

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QUANTUM CORPORATION
CONDENSED CONSOLIDATED BALANCE SHEETS
(In thousands)
(Unaudited)

*       Derived from the March 31, 2011 audited Consolidated Financial Statements.

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QUANTUM CORPORATION
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(In thousands)
(Unaudited)

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QUANTUM CORPORATION
GAAP TO NON-GAAP RECONCILIATION
(In thousands, except per share amounts)
(Unaudited)

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QUANTUM CORPORATION
GAAP TO NON-GAAP RECONCILIATION
(In thousands, except per share amounts)
(Unaudited)

The non-GAAP information set forth in this table is not prepared in accordance with generally accepted accounting principles and may be different from non-GAAP financial information used by other companies.

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QUANTUM CORPORATION
FULL YEAR AND FIRST QUARTER FISCAL 2013 FORECASTS
GAAP TO NON-GAAP RECONCILIATION
(Dollars in millions)

FULL YEAR FISCAL 2013

For fiscal 2013, we forecast GAAP and non-GAAP gross margin rates in the mid-40 percent range, with non-GAAP gross margin approximately 100 basis points higher than GAAP gross margin, comprised of 0.6% for intangible amortization and 0.4% for share-based compensation.

FIRST QUARTER FISCAL 2013

Estimates based on current (May 9, 2012) projections.

The projected GAAP and non-GAAP financial information set forth in this table represent forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. For risk factors that could impact these projections, see our Annual Report on Form 10-K as filed with the SEC on June 14, 2011. We disclaim any obligation to update information in any forward-looking statement.

The non-GAAP financial information set forth in this table is not prepared in accordance with generally accepted accounting principles and may be different from non-GAAP financial information used by other companies.

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