2/24/2018 S-1 Table of Contents SIGNATURES Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant has duly caused this registration statement on Form S­1 to be signed on its behalf by the undersigned, thereunto duly authorized, in San Francisco, California, on the 23rd day of February, 2018. DROPBOX, INC. By: /s/ Andrew W. Houston Andrew W. Houston Chief Executive Officer POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Andrew W. Houston, Ajay V. Vashee, and Bart E. Volkmer, and each one of them, as his or her true and lawful attorneys­in­fact and agents, with full power of substitution and resubstitution, for him or her and in their name, place and stead, in any and all capacities, to sign any and all amendments (including post­effective amendments) to this registration statement, and to sign any registration statement for the same offering covered by this registration statement that is to be effective on filing pursuant to Rule 462(b) under the Securities Act of 1933, as amended, and all post­effective amendments thereto, and to file the same, with all exhibits thereto and other documents in connection herewith, with the Securities and Exchange Commission, granting unto said attorneys­in­fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys­in­fact and agents or any of them, or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof. Pursuant to the requirements of the Securities Act of 1933, as amended, this registration statement on Form S­1 has been signed by the following persons in the capacities and on the dates indicated. Signature Title Date /s/ Andrew W. Houston Chief Executive Officer and Chairman February 23, 2018 (Principal Executive Officer) Andrew W. Houston /s/ Ajay V. Vashee Chief Financial Officer February 23, 2018 (Principal Financial Officer) Ajay V. Vashee /s/ Timothy J. Regan Chief Accounting Officer February 23, 2018 (Principal Accounting Officer) Timothy J. Regan /s/ Donald W. Blair Director February 23, 2018 Donald W. Blair /s/ Arash Ferdowsi Director February 23, 2018 Arash Ferdowsi /s/ Paul E. Jacobs Director February 23, 2018 Paul E. Jacobs II­7 https://www.sec.gov/Archives/edgar/data/1467623/000119312518055809/d451946ds1.htm 234/235