Conference Call

If you are unable to listen live, the conference call will be archived and can be accessed for approximately 14 days.

This communication is being made in respect of the proposed merger transaction involving Mobile Mini and Mobile Storage Group and may be deemed to be soliciting material relating to the proposed transaction. In connection with the proposed transaction, Mobile Mini will file a proxy statement relating to a special meeting of its stockholders and other relevant documents concerning the proposed transaction with the Securities and Exchange Commission. BEFORE MAKING ANY VOTING OR INVESTMENT DECISION, STOCKHOLDERS OF MOBILE MINI ARE URGED TO READ THE PROXY STATEMENT REGARDING THE PROPOSED TRANSACTION AND ANY OTHER RELEVANT DOCUMENTS CAREFULLY IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED TRANSACTION. The definitive proxy statement will be mailed to Mobile Mini's stockholders. Stockholders of Mobile Mini will be able to obtain a free copy of the proxy statement, as well as other filings containing information about Mobile Mini without charge, at the Securities and Exchange Commission's Internet site (http://www.sec.gov). Copies of the proxy statement and the filings with the Securities and Exchange Commission that will be incorporated by reference in the proxy statement can also be obtained, when available, without charge, by directing a request to Mobile Mini, Inc. 7420 South Kyrene Road, Suite 101. Tempe, AZ 85283 Attention: Investor Relations.

Mobile Mini and its respective directors and executive officers and other persons may be deemed to be participants in the solicitation of proxies in respect of the proposed transaction. Information regarding Mobile Mini's directors and executive officers is available in Mobile Mini's notice of annual meeting and proxy statement for its most recent annual meeting and Mobile Mini's Annual Report on Form 10-K for the year ended December 31, 2006, which were filed with the Securities and Exchange Commission on March 1, 2007 and April 30, 2007, respectively. Other information regarding the participants in the solicitation and a description of their direct and indirect interests, by security holdings or otherwise, will be contained in the proxy statement and other relevant materials to be filed with the Securities and Exchange Commission when they become available.