X0609 4 2026-09-02 0 0001419951 Data Storage Corp DTST 0001535036 Stein Clifford false C/O DATA STORAGE CORPORATION 244 5TH AVENUE, SUITE 2821 NEW YORK NY 10001 1 0 0 0 0 Common Stock 2026-09-02 4 M 0 10000 0 A 10000 D Common Stock 2026-09-02 4 A 0 12000 0 A 22000 D Restricted Stock Unit 0 2026-09-02 4 M 0 10000 0 D Common Stock 10000 0 D Restricted stock units ("RSUs") convert into common stock on a one-for-one basis. Represents shares of common stock underlying the RSUs granted to the Reporting Person on January 29, 2026. The RSUs vested in full on September 2, 2026, the date of the Issuer's 2026 Annual Meeting of Stockholders. Represents the shares of the Issuer's common stock underlying a RSU grant to the Reporting Person on September 2, 2026, which RSUs will vest in full on the date of the Issuer's 2027 Annual Meeting of Stockholders, subject to the Reporting Person's continued service to the Issuer through the vesting date. /s/ Wendy Schmittzeh, Attorney-in-fact for Clifford Stein 2026-09-04