X0508 4 2025-12-16 0 0001419951 Data Storage Corp DTST 0001688899 Schwartz Harold J C/O DATA STORAGE CORP 244 5TH AVENUE, SUITE 2821 NEW YORK NY 10001 1 0 1 0 0 Common Stock 2025-12-16 4 M 0 9804 1.96 A 910563 D Common Stock 2025-12-16 4 M 0 16667 2.00 A 927230 D Common Stock 2025-12-16 4 M 0 10352 3.22 A 937582 D Stock Option 1.96 2025-12-16 4 M 0 9804 0 A Common Stock 9804 0 D Stock Option 2.00 2025-12-16 4 M 0 16667 0 A Common Stock 16667 0 D Stock Option 3.22 2025-12-16 4 M 0 10352 0 A Common Stock 10352 0 D Represents shares of common stock issued upon exercise of the unexercised portion of a stock option that was issued to the Reporting Person on March 1, 2023, the unexercised portion of which vested in full immediately upon consummation of the divestiture of the Issuer's CloudFirst business on September 11, 2025. The Option is exercisable for a term of 5 years. Represents shares of common stock issued upon exercise of the unexercised portion of a stock option that was issued to the Reporting Person on April 10, 2023, the unexercised portion of which vested in full immediately upon consummation of the divestiture of the Issuer's CloudFirst business on September 11, 2025. The Option is exercisable for a term of 5 years. Represents shares of common stock issued upon exercise of the unexercised portion of a stock option that was issued to the Reporting Person on January 2, 2024, the unexercised portion of which vested in full immediately upon consummation of the divestiture of the Issuer's CloudFirst business on September 11, 2025. The Option is exercisable for a term of 5 years. /s/ Wendy Schmittzeh, Attorney-in-fact 2025-12-18