Exhibit 16.1

July 27, 2023

Securities and Exchange Commission

100 F Street N.E.

Washington D.C. 20549-7561

Commissioners:

We have read Item 4.01 of the Current Report on Form 8-K of Quantum Corporation dated July 27, 2023, which we understand will be filed with the Securities and Exchange Commission, and we agree with the statements concerning our firm contained in such Form 8-K. We have no basis to agree or disagree with other statements of the registrant contained therein.

Very truly yours,

/s/ Armanino LLP

Armanino LLP

San Ramon, California