Digital Realty Trust Chooses Green Power in Paris

Digital Realty Trust and its Customers Support French Commitment to Renewable Energy

PARIS, September 28, 2010 - Digital Realty Trust, Inc. (NYSE: DLR), the world's largest wholesale
data centre provider, has adopted EDF's Certificats Equilibre scheme at its
Paris data centre. The facility in the French capital has now funded
8,921,000 kWh of renewable energy within the national electricity network.
Introduced in coordination with clients at the data centre, the scheme
enables Digital Realty Trust to participate in the development of responsible
energy sources within one of its key European markets.

"As a company we have a firm belief in the value of green initiatives.
Working with both our customers and EDF, we are pleased to contribute to the
use of renewable energy within the French market," commented Bernard
Geoghegan, Senior Vice President of International Operations for Digital
Realty Trust. "Throughout our portfolio we have achieved top accreditations
in the LEED and BREEAM green building certification schemes, and have an
ongoing participation in the Green Grid. Through that contribution we have
helped raise the standards for green data centres in the wider market, and
are currently working on new technologies to further reduce the environmental
impact of data centres."

"Our space in Digital Realty Trust's data centre gives us a strong
presence in this important French market and has allowed us to directly
support the development of controlled and responsible energy sources," says
Mathieu Louvrier, Director of Business Continuity and Recovery Services at
IBM France. "The Certificats Équilibre scheme enables us to contribute to
France's national objectives for the use of renewable energy, and to
reinforce our own commitment to greener data centres."

For each certificate purchased within EDF's Certificats Equilibre scheme,
EDF guarantees to place 1 MWh (1000 kWh) of electricity, which has been
produced using renewable energy sources, into the French electricity network.
Equilibre certificates are certified by the independent body Observ'ER.

About Digital Realty Trust, Inc.

Digital Realty Trust, Inc. (the Company) is the world's largest wholesale
data centre provider. The Company is focused on providing Turn-Key
Datacentre(R) and Powered Base Building(R) datacentre 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 95 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 datacentre tenants.
Comprising approximately 16.7 million rentable square feet as of August 30,
2010, including 2.1 million square feet of space held for redevelopment,
Digital Realty Trust's portfolio is located in 27 markets throughout North
America and Europe. For additional information, please visit Digital Realty
Trust's website at www.digitalrealtytrust.co.uk.

Safe Harbour Statement

This press release contains forward-looking statements which are based on
Digital Realty Trust, Inc.'s current expectations, forecasts and assumptions
that involve risks and uncertainties that could cause actual outcomes and
results to differ materially, including statements related to new
technologies to further reduce the environmental impact of data centres.
These risks and uncertainties include, among others, the following: the
impact of the recent deterioration in global economic, credit and market
conditions; current local economic conditions in its geographic markets;
decreases in information technology spending, including as a result of
economic slowdowns or recession; adverse economic or real estate developments
in its industry or the industry sectors that it sells to (including risks
relating to decreasing real estate valuations and impairment charges); its
dependence upon significant tenants; bankruptcy or insolvency of a major
tenant or a significant number of smaller tenants; defaults on or non-renewal
of leases by tenants; its failure to obtain necessary debt and equity
financing; increased interest rates and operating costs; its failure to repay
debt when due or its breach of covenants or other terms contained in its loan
facilities and agreements; financial market fluctuations; changes in foreign
currency exchange rates; its inability to manage its growth effectively;
difficulty acquiring or operating properties in foreign jurisdictions; its
failure to successfully operate acquired or redeveloped properties; risks
related to joint venture investments, including as a result of its lack of
control of such investments; delays or unexpected costs in development or
redevelopment of properties; decreased rental rates or increased vacancy
rates; increased competition or available supply of data center space; its
inability to successfully develop and lease new properties and space held for
redevelopment; difficulties in identifying properties to acquire and
completing acquisitions; its inability to acquire off-market properties; its
inability to comply with the rules and regulations applicable to reporting
companies; its failure to maintain its status as a REIT; possible adverse
changes to tax laws; restrictions on its ability to engage in certain
business activities; environmental uncertainties and risks related to natural
disasters; changes in foreign laws and regulations, including those related
to taxation and real estate ownership and operation; 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 Digital Realty Trust, Inc. with the U.S. Securities and
Exchange Commission, including Digital Realty Trust, Inc.'s Annual Report on
Form 10-K for the year ended December 31, 2009 and Digital Realty Trust,
Inc.'s Quarterly Reports on Form 10-Q for the quarters ended March 31, 2010
and June 30, 2010. Digital Realty Trust, Inc. 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 Stein    Pamela A. Matthews        Bernard Geoghegan
    Chief Financial     Investor/Analyst          SVP, International
     Officer and         Information               Operations
    Chief Investment    Digital Realty            Digital Realty
     Officer             Trust, Inc.               Trust, Inc.
    Digital Realty      +1-415-738-6500           +353-1-245-0650
     Trust, Inc.
    +1-415-738-6500

A. William Stein, Chief Financial Officer and Chief Investment Officer, or Pamela A. Matthews, Investor/Analyst Information, +1-415-738-6500, or Bernard Geoghegan, SVP, International Operations, +353-1-245-0650, all of Digital Realty Trust, Inc.