X0508 4 2025-12-10 0 0001419951 Data Storage Corp DTST 0001448428 Piluso Charles M. C/O DATA STORAGE CORP 244 5TH AVENUE, SUITE 2821 NEW YORK NY 10001 1 1 1 0 Chairman and CEO 0 Common Stock 2025-12-10 4 S 0 20089 4.9934 D 413291 D Common Stock 16667 I Piluso Family Associates Common Stock 65083 I Piluso Family Associates LLC Common Stock 230116 I The Lasata 2012 Trust date 5/4/12 Common Stock 230116 I The Bella Vita 2012 Trust dated 5/4/12 Represents shares of the Issuer's common stock sold to satisfy tax withholding obligations of Charles M. Piluso (the "Reporting Person") The price reported is a weighted average price. These shares were disposed in multiple transactions at prices ranging from $4.9518 through $5.0001 (the "Range"), inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the Range. The Reporting Person is a Managing Member of Piluso Family Associates, together with his spouse. The Reporting Person is a Managing Member of Piluso Family Associates LLC, together with his spouse. The Reporting Person's spouse is the beneficiary of The Lasata 2012 Trust dated 5/4/12 (the "Lasata Trust") and the Reporting Person's spouse, together with Lawrence Maglione, a director of the Issuer, are the co-trustees of the Lasata Trust. The Reporting Person is the beneficiary of The Bella Vita 2012 Trust dated 5/4/12 (the "Bella Vita Trust") and the Reporting Person, together with his spouse, are the co-trustees thereof. /s/ Wendy Schmittzeh, Attorney-in-fact 2025-12-12