In a brief filed on Tuesday with the Foreign Intelligence Surveillance Court, Dropbox argued that the gag order violates its First Amendment rights.
"The Court should not permit the government to invoke the mere label of 'national security' to justify the speech restraints it seeks — especially not here, where the speech will inform the public about the government's use of its national security powers," the company wrote.
Dropbox allows users to store videos, photos and documents online.
Google, Microsoft, Facebook, Yahoo and LinkedIn have all sued for the right to publish more data about government information requests.
The Justice Department has agreed to let companies publish statistics combining law enforcement and national security requests within a range of 1,000 requests. But Dropbox argued that because it receives so few total requests, publishing ranges of 1,000 requests is useless.