X0508 4/A 2025-12-12 2025-12-15 0 0001419951 Data Storage Corp DTST 0001803509 Grover Matthew C/O DATA STORAGE CORP 244 5TH AVENUE, SUITE 2821 NEW YORK NY 10001 1 0 0 0 0 Common Stock 2025-12-12 4 F 0 10202 4.97 D 43340 D Represents shares withheld to cover the exercise price of the options exercised. On December 15, 2025, the reporting person filed a Form 4 which inadvertently underreported the number of shares withheld by the Company to cover the exercise price in connection with the exercise of an option by 12 shares. As reported in this amendment, 10,202 shares were in fact withheld. /s/ Wendy Schmittzeh, Attorney-in-fact 2026-01-16