Exhibit 4.1

|Number |  |                                                                                                                                                                                                                                                                      |  |                                  |  |                                                 |  | Shares
|------ |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | -------------------------------- |  | ----------------------------------------------- |  | ------
|OS     |  |                                                                                                                                                                                                                                                                      |  |                                  |  |                                                 |  |       
|       |  | COMMON STOCK                                                                                                                                                                                                                                                         |  | [OVERLAND STORAGE LOGO]          |  | COMMON STOCK                                    |  |       
|       |  | INCORPORATED UNDER THE LAWS OF THE STATE OF CALIFORNIA                                                                                                                                                                                                               |  |                                  |  | SEE REVERSE FOR CERTAIN DEFINITIONS AND LEGENDS |  |       
|       |  |                                                                                                                                                                                                                                                                      |  |                                  |  | CUSIP 690310 10 7                               |  |       
|       |  | THIS CERTIFIES THAT                                                                                                                                                                                                                                                  |  |                                  |  |                                                 |  |       
|       |  | SPECIMEN                                                                                                                                                                                                                                                             |  |                                 
|       |  | is the owner of                                                                                                                                                                                                                                                      |  |                                  |  |                                                 |  |       
|       |  | FULLY PAID AND NONASSESSABLE SHARES OF THE COMMON STOCK, NO PAR VALUE SHARE, OF                                                                                                                                                                                      |  |                                 
|       |  | OVERLAND STORAGE, INC.                                                                                                                                                                                                                                               |  |                                 
|       |  | transferable on the books of the Corporation by the holder hereof in person or by duly authorized attorney on surrender of this certificate properly endorsed. This certificate is not valid until countersigned and registered
by the Transfer Agent and Registrar. |  |                                 
|       |  | WITNESS the facsimile seal of the Corporation and the facsimile signatures of its duly authorized officers.                                                                                                                                                          |  |                                 
|       |  | Dated:                                                                                                                                                                                                                                                               |  |                                  |  |                                                 |  |       
|       |  |                                                                                                                                                                                                                                                                      |  |                                  |  |                                                 |  |       
|       |  | /s/V.A. LOFORTI                                                                                                                                                                                                                                                      |  | [SEAL]                           |  | /s/CHRISTOPHER CALISI                           |  |       
|       |  | SECRETARY                                                                                                                                                                                                                                                            |  |                                  |  | PRESIDENT AND CHIEF EXECUTIVE OFFICER           |  |       
|       |  |                                                                                                                                                                                                                                                                      |  | COUNTERSIGNED AND REGISTERED:    |  |                                                
|       |  |                                                                                                                                                                                                                                                                      |  | WELLS FARGO BANK MINNESOTA, N.A.
|       |  |                                                                                                                                                                                                                                                                      |  |                                  |  | TRANSFER AGENT                                  |  |       
|       |  |                                                                                                                                                                                                                                                                      |  |                                  |  | AND REGISTRAR                                   |  |       
|       |  |                                                                                                                                                                                                                                                                      |  |                                  |  | BY                                              |  |       
|       |  |                                                                                                                                                                                                                                                                      |  |                                  |  | AUTHORIZED SIGNATURE                            |  |       

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OVERLAND STORAGE, INC.

Shareholders may obtain, upon request and without charge, a statement of the rights, preferences, privileges and restrictions granted to or imposed upon each
class of shares authorized to be issued and upon the holders thereof from the Corporation.

The following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though they were written out in full according to
applicable laws or regulations:

|TEN COM |  |  | as tenants in common                                                     |  |  |  | UNIF GIFT MIN ACT |  |  |                                              |  | Custodian              |  |        
|------- | - |  | ------------------------------------------------------------------------ |  |  |  | ----------------- | - |  | -------------------------------------------- |  | ---------------------- |  | -------
|TEN ENT |  |  | as tenants by the entireties                                             |  |  |  |                   |   |  | (Cust)                                       |  |                        |  | (Minor)
|JT TEN  |  |  | as joint tenants with right of survivorship and not as tenants in common |  |  |  |                   |   |  | under Uniform Gifts to Minors Act(State)    
|        |   |  |                                                                          |  |  |  | UNIF TRF MIN ACT  |  |  |                                              |  | Custodian (until age ) |  |        
|        |   |  |                                                                          |  |  |  |                   |   |  | (Cust)                                       |  |                        |  | (Minor)
|        |   |  |                                                                          |  |  |  |                   |   |  | under Uniform Transfers to Minors Act(State)

Additional abbreviations may also be used though not in the above list.

For Value Received,
 hereby sell, assign and transfer unto

|PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE                                                    |  |          |  |  |  | 
|------------------------------------------------------------------------------------------------------------------------ |  | -------- |  |  |  | 
|(PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)                                           
|                                                                                                                        
|                                                                                                                        
|                                                                                                                         |  | Shares  
|of the Common Stock represented by the within certificate, and do hereby irrevocably constitute and appoint             
|                                                                                                                         |  | Attorney
|to transfer the said stock on the books of the within named Corporation with full power of substitution in the premises.

|Dated                   |  |         |  |                                                                                                                                                                                                
|----------------------- |  | ------- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|                        |  |         |  |                                                                                                                                                                                                
|                        |  |         |  |                                                                                                                                                                                                
|                        |  | NOTICE: |  | THE SIGNATURE(S) TO THIS ASSIGNMENT MUST CORRESPOND WITH THE NAME(S) AS WRITTEN UPON THE FACE OF THE CERTIFICATE IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT OR ANY CHANGE WHATEVER.
|Signature(s) Guaranteed |  |        

|                                                                                                                                                                                                                                                       |  |  |  | 
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |  |  |  | 
|By                                                                                                                                                                                                                                                     |  |  |  | 
|THE SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION
PROGRAM), PURSUANT TO S.E.C. RULE 174d-15. |  | 
|                                                                                                                                                                                                                                                       |  |  |  | 

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