Exhibit 10.1

THIRD SUPPLEMENTAL INDENTURE

THIRD SUPPLEMENTAL INDENTURE, dated as of March 19, 2010 (this “Third Supplemental Indenture”), among Seagate Technology International, an exempted limited liability company organized under the laws of the Cayman Islands (the “Issuer”), Seagate Technology, an exempted limited liability company organized under the laws of the Cayman Islands, the other Guarantors under the Indenture referred to below and Wells Fargo Bank, National Association, as trustee under the Indenture referred to below (the “Trustee”).

W I T N E S S E T H:

WHEREAS, the Issuer, the Guarantors and the Trustee are party to an Indenture, dated as of May 1, 2009 (as amended, the “Indenture”), under which an aggregate principal amount of $430,000,000 of the Issuer’s 10.00% Senior Secured Second-Priority Notes due 2014 (the “Notes”) have been issued;

WHEREAS, Seagate HDD Cayman, an exempted limited liability company incorporated under the laws of the Cayman Islands (“New Cayco”), became a Guarantor under the Indenture pursuant to a supplemental indenture, dated as of March 1, 2010 (the “First Supplemental Indenture”), among the Issuer, New Cayco and the Trustee;

WHEREAS, Seagate Technology plc, a public limited company incorporated under the laws of Ireland (“Seagate Ireland”), became a Guarantor under the Indenture pursuant to a supplemental indenture, dated as of March 1, 2010 (the “Second Supplemental Indenture”), among the Issuer, Seagate Ireland and the Trustee;

WHEREAS, the Guarantee of the Notes by Seagate Ireland is secured on a second priority basis by the collateral security provided for by that certain Second Priority Debenture and Second Priority Mortgage of Shares in Seagate Technology, each dated March 1, 2010, between Seagate Ireland and Wells Fargo Bank, National Association, as Collateral Agent;

WHEREAS, pursuant to transactions encompassing the “Transaction” (as defined in the Proxy Statement of Seagate Technology, dated March 5, 2010), Seagate Technology will merge with a subsidiary of Seagate Ireland; Seagate Technology will survive such merger and will become a wholly-owned Subsidiary of Seagate Ireland;

WHEREAS, Section 9.02 of the Indenture provides that, with the written consent of the Holders of a majority in aggregate principal amount of the outstanding Notes (the “Requisite Consents”), the Issuer and the Trustee may amend the Indenture;

WHEREAS, the Issuer has completed a consent solicitation (the “Consent Solicitation”) whereby the Issuer has obtained the Requisite Consents to amend certain sections of the Indenture (the “Amendments”);

WHEREAS, in connection with the Consent Solicitation, Holders that delivered a valid consent on a timely basis (the “Consenting Holders”) are entitled to receive a cash fee (the “Cash Fee”) with respect to the Notes in respect of which they have validly consented if the conditions to the Consent Solicitation are met;

WHEREAS, the Issuer, the Guarantors and the Trustee are entering into this Third Supplemental Indenture in order to set forth the Amendments; and

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WHEREAS, this Third Supplemental Indenture has been duly authorized by all necessary corporate or other action on the part of the Issuer, the Guarantors and the Trustee.

NOW THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the Issuer, the Guarantors and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

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AMENDMENTS OF THE INDENTURE

Section 1.01.        First Paragraph of the Indenture.  The Issuer, the Guarantors and the Trustee hereby agree to amend the first paragraph of the Indenture, and such first paragraph is hereby amended by deleting the phrase “(the “Company”)” contained therein.

Section 1.02.        Amendment to Section 1.01 of the Indenture.  The Issuer, the Guarantors and the Trustee hereby agree to amend Section 1.01 of the Indenture, and such Section 1.01 is hereby amended by deleting the definitions of “Change of Control”, “Company” and “Guarantor” in their entirety and adding the following new definitions of “Change of Control”, “Company”, “Guarantor” and “Seagate Technology” in the appropriate alphabetical order:

“Change of Control” means:

(1)           any “person” (as such term is used in Sections 13(d) and 14(d) of the Exchange Act) (other than, in the case of the Issuer, the Company, Seagate Technology, Seagate HDD or any other Wholly Owned Restricted Subsidiary) is or becomes the “beneficial owner” (as defined in Rules 13d-3 and 13d-5 under the Exchange Act, except that for purposes of this clause (1) such person shall be deemed to have “beneficial ownership” of all shares that any such person has the right to acquire, whether such right is exercisable immediately or only after the passage of time), directly or indirectly, of more than 50% of the total voting power of the Voting Stock of the Company or the Issuer (for purposes of this clause (1), a person shall be deemed to beneficially own any Voting Stock of a person (the “specified person”) held by any other person (the “parent entity”) so long as such person is the beneficial owner (as defined in this clause (1)), directly or indirectly, of more than 50% of the voting power of the Voting Stock of the parent entity);

(2)           individuals who on the Issue Date constituted the board of directors of the Company (which for purposes of this clause (2) shall be deemed to be directors of Seagate Technology as of the Issue Date) or the Issuer, as applicable (together with any new directors whose election by such board of directors of the Company or the Issuer or whose nomination for election by the shareholders of the Company or the Issuer was approved by a vote of a majority of the directors of the Company or the Issuer then still in office who were either directors on the Issue Date or whose election or nomination for election was previously so approved) cease for any reason to constitute a majority of the board of directors of the Company or the Issuer then in office;