As widely suspected, the discovery in ques appears to relate to Michael Cohen —incl phone data that SDNY declined to provide bc it was "unduly burdensome" & DA obtained his phones by consent.
"USAO did not provide DANY w data from Cohen's phones in resp to our requests. In course of USAO's productions, DANY followed up, incl on Jan 31, 2023 & February 6, 2023, to repeat our requests for data from Cohen's phones that the USAO obtained pursuant to search warrant. [...] “