Exhibit 99.1

Overland Storage Reports First Quarter Fiscal 2014 Results

San Diego, CA – November 13, 2013 – Overland Storage (NASDAQ: OVRL), a trusted global provider of unified data management and data protection solutions across the data lifecycle, today reported financial results for its fiscal 2014 first quarter ended September 30, 2013.

“We are excited about our agreement to acquire Tandberg Data, which would create a company which had approximately $110 million in annual revenue in our last fiscal year and would provide substantial resources and cost synergies, enabling us to compete more effectively in the marketplace and move toward a clearer path to profitability following integration of the two companies,” said Eric Kelly, President and CEO of Overland Storage. “With this acquisition, we would have a larger sales engine and expanded market reach to realize the growth potential of the innovative and award-winning products we have developed over the last couple years.

“During the quarter, we continued to see solid growth in revenue from our SnapServer DX Series, both from the immediately preceding quarter and year-over-year, and we remain on track to begin rolling out our mobility business solution in the first quarter of calendar 2014, which is designed to enable us to deliver the full functionality of true native applications to any mobile device anywhere as a workforce productivity solution. Moving forward, we expect our products to benefit from a substantially expanded channel of 16,000 partners as a result of our acquisition of Tandberg Data.”

Recent Highlights:

First Quarter Fiscal 2014 Financial Results

Investor Conference Call:

Overland will host an investor conference call today, Wednesday, November 13, at 5:00 pm ET (2:00 pm PT) to discuss the Company’s first quarter fiscal 2014 financial results. To access the call dial 877-941-2069 (+1 480-629-9713 outside the United States) and when prompted provide the pass code “Overland Storage” to the operator. Participants are asked to call the assigned number approximately 10 minutes before the conference call begins. In addition, a live and archived webcast of the conference call will be available over the Internet at www.overlandstorage.com in the Investor Relations section. A replay of the conference call will also be available via telephone by dialing (800) 406-7325 (+1 (303) 590-3030 outside the United States) and entering access code, 4650271#, beginning 8:00 p.m. ET on November 13, 2013 through 11:59 p.m. ET on November 20, 2013.

About Overland Storage

Overland Storage is a trusted global provider of unified data management and data protection solutions across the data lifecycle. By providing an integrated range of technologies and services for primary, nearline, offline, and archival data storage, Overland makes it easy and cost effective to manage different tiers of information over time whether distributed data is across the hall or across the globe. Overland SnapScale, SnapServer, SnapSAN, NEO Series and REO Series solutions are available through a select network of value-added resellers and system integrators. For more information, visit www.overlandstorage.com.

Safe Harbor Statement

Except for the factual statements made herein, the information contained in this news release consists of forward-looking statements that involve risks, uncertainties and assumptions that are difficult to predict. Words and expressions reflecting optimism, satisfaction or disappointment with current prospects, as well as words such as “believes,” “hopes,” “intends,” “estimates,” “expects,” “projects,” “plans,” “anticipates” and variations thereof, or the use of future tense, identify forward-looking statements, but their absence does not mean that a statement is not forward-looking. Such forward-looking statements are not guarantees of performance and our actual results could differ materially from those contained in such statements. Factors that could cause or contribute to such differences include, but are not limited to: the occurrence of any event, change or other circumstances that could give rise to the termination of the definitive acquisition agreement, the failure to obtain shareholder approval or the failure to satisfy the closing conditions, the failure to obtain the necessary regulatory approvals on conditions permissible under the acquisition agreement, risks related to disruption of management’s attention from our ongoing business operations due to the transaction, the effect of the announcement of the acquisition on the ability of Overland and Tandberg to retain customers and retain and hire key personnel and maintain relationships with its suppliers, operating results and business generally; our ability to maintain and increase sales volumes of our products; our ability to continue to aggressively control costs and operating expenses; our ability to achieve the intended cost savings and maintain quality with our manufacturing partner; our ability to generate cash from operations; the ability of our suppliers to provide an adequate supply of components for our products at prices consistent with historical prices; our ability to raise outside capital and to repay our debt as it comes due; our ability to introduce new competitive products and the degree of market acceptance of such new products; the timing and market acceptance of new products introduced by our competitors; our ability to maintain strong relationships with branded channel partners; our ability to regain compliance with the continued listing requirements of, and thereby maintain the listing of our common stock on the NASDAQ Capital Market; customers’, suppliers’ and creditors’ perceptions of our continued viability; rescheduling or cancellation of customer orders; loss of a major customer; our ability to enforce our intellectual property rights and protect our intellectual property (including the outcome of our ongoing patent litigation); general competition and price measures in the market place; unexpected shortages of critical components; worldwide information technology spending levels; and general economic conditions. Reference is also made to other factors detailed from time to time in our periodic reports filed with the Securities and Exchange Commission. These forward-looking statements speak only as of the date of this release and we undertake no obligation to publicly update any forward-looking statements to reflect new information, events or circumstances after the date of this release.

Connect with Overland Storage:

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Overland Storage, SnapScale, SnapSAN, SnapServer, NEO Series, REO Series and the Overland logo are trademarks of Overland Storage, Inc., that may be registered in some jurisdictions. All other trademarks used are owned by their respective owners.

Investor Relations Contact:

Todd Kehrli or Jim Byers

MKR Group Inc.

323-468-2300

ovrl@mkr-group.com

OVERLAND STORAGE, INC.

CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS

(In thousands, except per share data)

OVERLAND STORAGE, INC.

CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS

(In thousands, except per share data)

OVERLAND STORAGE, INC.

SELECTED BALANCE SHEETS INFORMATION

(In thousands)