POWER OF ATTORNEY



		KNOW ALL BY THESE PRESENTS, that the undersigned hereby constitutes
and appoints each of Kenneth M. Massaroni, Roberta S. Cohen and Jolene A. Mendelsohn,
signing singly, the undersigned's true and lawful attorney-in-fact to:

(1)	execute for and on behalf of the undersigned, in the undersigned's
capacity as an officer and/or director of Seagate Technology plc (the
"Company") or as a holder of 10% or more of the Company's securities,
Forms 3, 4 and 5 in accordance with Section 16 of the Securities Exchange
Act of 1934, as amended, and the rules thereunder;

(2)	do and perform any and all acts for and on behalf of the undersigned that
may be necessary or desirable to complete and execute any such Form 3, 4
or 5 and timely file such form with the United States Securities and
Exchange Commission and any stock exchange or similar authority; and

(3)	take any other action of any type whatsoever in connection with the
foregoing that, in the opinion of such attorney-in-fact, may be of benefit
to, in the best interest of or legally required to be done by the undersigned,
it being understood that the documents executed by such attorney-in-fact
on behalf of the undersigned pursuant to this Power of Attorney shall be in
such form and shall contain such terms and conditions as such attorney-in-
fact may approve in such attorney-in-fact's discretion.

		The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite, necessary or
proper to be done in the exercise of any of the rights and powers herein granted, as fully to all
intents and purposes as the undersigned might or could do if personally present, with full power
of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or
such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of
this Power of Attorney and the rights and powers herein granted.  The undersigned
acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of
the undersigned, are not assuming, nor is the Company assuming, any of the undersigned's
responsibilities to comply with Section 16 of the Securities Exchange Act of 1934, as amended,
and the rules thereunder.

		This Power of Attorney shall remain in full force and effect until the undersigned
is no longer required to file Forms 3, 4 and 5 with respect to the undersigned's holdings of and
transactions in securities issued by the Company, unless earlier revoked by the undersigned in a
signed writing delivered to the foregoing attorneys-in-fact.




		IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of the date written below.


Date:  July 25, 2012

By:


 /s/ Mei Wei Cheng

Name:  Mei Wei Cheng