SAN FRANCISCO and LONDON, Jan. 30 /PRNewswire-FirstCall/ -- Digital Realty Trust, Inc. (NYSE: DLR), a leading owner and manager of corporate and Internet gateway datacentres, announced today that the Company has begun construction on a custom datacentre facility for HSBC (NYSE: HBC), the global banking and financial services institution. Located on a development site in suburban London that was acquired by Digital Realty Trust in April 2007, the new state-of-the-art datacentre facility is being built by Digital Realty Trust to support HSBC's global computing infrastructure. HSBC and Digital Realty Trust have signed a long-term lease agreement for the build-to-suit datacentre. The companies have collaborated closely in developing its specifications to support HSBC's security requirements, environmental goals, and a wide range of other technical and business needs. The project is expected to be completed in late 2008.

"Having a partner for this datacentre project with the experience and resources that Digital Realty Trust offers is a major asset for us. During the design and planning phase for this datacentre facility; Digital's team has been an extension of our own, and the result is a plan that we feel very confident in," said Roy Adorni, Global Head of Data Center Services for HSBC. "Digital Realty Trust's expertise will be just as important now that construction is under way to ensure that the project goes according to plan, meets all of our technical needs, and is completed on time and on budget. A project of this magnitude requires a high level of specialized expertise, which is why we put such an emphasis on selecting the right partner."

"We are very pleased to be HSBC's partner in this major datacentre facility project, which will serve as the cornerstone of its IT infrastructure in the London market. This project with HSBC reflects our unique approach to partnering with companies on build-to-suit datacentres, offering them control and flexibility while making these large projects very cost-effective," said Chris Crosby, Senior Vice President of Digital Realty Trust. "Our proven ability to work with local utility companies and identify sites that have or can be provisioned with sufficient power to support today's datacentre power and cooling requirements gives our customers a significant advantage when looking to expand, consolidate or upgrade their datacentre facilities."

Digital Realty Trust has built custom datacentres for numerous global companies, including financial services companies that have very specific, complex datacentre requirements for the high-volume, low-latency computing systems. Digital Realty Trust manages all build-to-suit datacentre projects using its proprietary Gating Process(TM) which ensures delivery of custom datacentre projects through the timely, efficient coordination of all processes involved in design and construction while optimizing costs. Unlike traditional development methods for build-to-suit projects, Digital Realty Trust's Gating Process(TM) provides customers with transparency and inputs at key stages of the project -- from scope and schematic through commissioning and completion -- ensuring that the finished datacentre facility supports the unique needs of each organization.

About HSBC

Headquartered in London, HSBC is one of the largest banking and financial services organizations in the world. HSBC's international network comprises around 10,000 offices in 82 countries and territories in Europe, the Asia-Pacific region, the Americas, the Middle East and Africa. Through an international network linked by advanced technology, including a rapidly growing e-commerce capability, HSBC provides a comprehensive range of financial services including personal financial services, commercial banking; corporate investment banking, private banking and other activities. For more information, visit http://www.hsbc.com.

About Digital Realty Trust, Inc.

Digital Realty Trust, Inc. owns, acquires, redevelops, develops and manages technology-related real estate. The Company is focused on providing Turn-Key Datacenter(TM) and Powered Base Building(TM) datacenter solutions for domestic and international tenants across a variety of industry verticals ranging from information technology and internet enterprises, to manufacturing and financial services. Digital Realty Trust's 70 properties, excluding one property held as an investment in an unconsolidated joint venture, contain applications and operations critical to the day-to-day operations of technology industry tenants and corporate enterprise datacenter tenants. Comprising approximately 12.3 million rentable square feet as of January 30, 2008, including 1.9 million square feet of space held for redevelopment, Digital Realty Trust's portfolio is located in 26 markets throughout North America and Europe. For additional information, please visit Digital Realty Trust's website at http://www.digitalrealtytrust.com.

Safe Harbor Statement

This press release contains forward-looking statements, which are based on current expectations, forecasts and assumptions that involve risks and uncertainties that could cause actual outcomes and results to differ materially, including statements related to the expected completion date for the project. These risks and uncertainties include adverse economic or real estate developments in the Company's markets or the technology or banking industry; general economic conditions; defaults on or non-renewal of leases by tenants; increased interest rates and operating costs; inability to manage domestic and international growth effectively; failure to obtain necessary outside financing; decreased rental rates or increased vacancy rates; difficulties in identifying properties to acquire and completing acquisitions at acceptable return levels; failure to successfully operate acquired properties and operations; failure of acquired properties to perform as expected; failure to successfully redevelop properties acquired for such purposes or unexpected costs related thereto; failure to maintain the Company's status as a REIT; environmental uncertainties and risks related to natural disasters; financial market fluctuations; changes in foreign currency exchange rates; risks of operating in foreign markets; and changes in real estate and zoning laws and increases in real property tax rates. For a further list and description of such risks and uncertainties, see the reports and other filings by the Company with the United States Securities and Exchange Commission, or SEC, including the Company's annual report on Form 10-K for the year ended December 31, 2006, as updated by subsequent reports on Form 10-Q and Form 8-K filed with the SEC. The Company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

     For Additional Information:

     A. William SteinPamela A. Matthews
     Chief Financial Officer and         Investor/Analyst Information
     Chief Investment Officer            Digital Realty Trust, Inc.Digital Realty Trust, Inc.          (415) 738-6500
     (415) 738-6500

     Chris Crosby
     Sales & Technical Operations
     Digital Realty Trust, Inc.
     (214) 231-1350

SOURCE Digital Realty Trust, Inc.