Visa Europe Selects Digital Realty Trust Data Centre

LONDON, June 8, 2011 -

- Bespoke Data Centre Customer Agreement Adds to Financial Services
Client Base

Digital Realty Trust, Inc. (NYSE: DLR), a global provider of wholesale
data centres, has signed a bespoke data centre agreement with Visa Europe.
The new site will provide 10,000 square feet of raised floor space close to
London. This is the second major financial services organisation to sign a
lease with Digital Realty Trust in recent months, indicating that the need
for data centres, and investment in these critical facilities, continues to
grow within the European marketplace.

Through its Build-to-Suit programme, Digital Realty Trust will leverage
its data centre design and construction expertise to oversee the construction
of the new data centre. The project will be completed under Digital Realty
Trust's exclusive guaranteed timeframe and budget programme.

"Visa is committed to consistently providing its European customers with
robust, reliable and secure payment services, and to achieve this we rely on
state of the art data centre facilities which provide the foundation for our
business," said Steve Chambers, CIO, Visa Europe. "By working with Digital
Realty Trust, we have been able to achieve our needs within a defined
timeframe and budget. This level of commitment is critical to minimise our
risks and optimise our operations."

"With two financial services organisations having signed agreements with
Digital Realty Trust in recent months, we continue to see escalating demand
for data centre space across the EU," said Frederick Potter, Head of
International Operations of Digital Realty Trust. "By choosing our
Build-to-Suit data centre programme, Visa Europe has been able to specify its
exact requirements for the proposed facility, with the full support of our
industry experts. Through our integrated service, our customers gain access
to the most up-to-date datacentre technology in a prime location with none of
the risk associated with a do-it-yourself project."

About Digital Realty Trust, Inc.

Digital Realty Trust, Inc. enables customers to deliver critical business
applications by providing secure, reliable and cost effective datacentre
facilities. Digital Realty Trust's customers include domestic and
international companies across multiple industry verticals ranging from
information technology and Internet enterprises, to manufacturing and
financial services. Digital Realty Trust's 96 properties, excluding two
properties held as investments in unconsolidated joint ventures, comprise
approximately 16.9 million square feet as of April 29, 2011, including 2.2
million square feet of space held for redevelopment. Digital Realty Trust's
portfolio is located in 28 markets throughout Europe, North America and
Singapore. Additional information about Digital Realty Trust is included in
the Company Overview, which is available on the Investors page of Digital
Realty Trust's website at www.digitalrealtytrust.co.uk.

Safe Harbor 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 Digital Realty
Trust, Inc.'s bespoke data centre agreement with Visa Europe and demand for
datacentre space in Europe. 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; risks associated with using debt to fund its business activities,
including re-financing and interest rate risks, its failure to repay debt
when due, adverse changes in its credit ratings 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 integrate and 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; losses in excess of its insurance coverage; changes in foreign
laws and regulations, including those related to taxation and real estate
ownership and operation; and changes in local, state and federal regulatory
requirements, including 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, 2010 and Quarterly Report on Form 10-Q for the quarter ended March 31,
2011. 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
    Chief Financial Officer and Chief Investment Officer
    Digital Realty Trust, Inc.
    +1-415-738-6500             

    Pamela Matthews Garibaldi
    Vice President, Investor Relations and Corporate Marketing
    Digital Realty Trust, Inc.
    +1-415-738-6532

    Frederick S. Potter
    Head of International Operations
    Digital Realty Trust, Inc.
    +44-207-954-9100

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