According to the letter, Cohen’s legal team scoured files pulled from 13 different mobile devices and iPads and 20 digital media devices.
Cohen is under federal investigation for his business dealings and for his role in an alleged hush-money payment to adult film-star Stephanie Clifford, known as Stormy Daniels.
The president has denied allegations of a sexual relationship with Daniels.
Cohen has not been charged with a crime.
Lawyers for President Trump and the Trump Organization – which intervened in the case – currently have a deadline of Wednesday to finish reviewing documents, after which all of the materials not designated as privileged are to be turned over to the government.
Last week, sources told ABC News that Cohen hired New York lawyer Guy Petrillo to represent him in the federal investigation going forward. Petrillo is a former head of the criminal division of the U.S. Attorney’s Office in Manhattan.
Cohen’s current lawyers, Stephen Ryan and Todd Harrison, made no mention of a legal team shakeup in their Monday letter to Judge Wood.