Hyperscale Data (GPUS) SC 13DGIGA TRONICS / BitNile ownership change

Exhibit 99.1

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a Statement on Schedule 13D (including additional amendments thereto) with respect to the shares of Common Stock, no par value, of Giga-tronics Incorporated, a California corporation. This Joint Filing Agreement shall be filed as an Exhibit to such Statement.

Dated:    September 19, 2022