Does a file-sharing software provider have a reasonable expectation of privacy in sharing images with other members of the public?

^6. Dreyer voluntarily placed pornographic images on a peer-to-peer file-sharing network, granting members of the public free access to them. Under our Fourth Amendment jurisprudence, accessing files made available through file-sharing software does not constitute a search. United States v. Ganoe, 538 F.3d 1117, 1127 (9th Cir. 2008) (no objectively reasonable expectation of privacy in files shared through file-sharing software). We have said that when an individual uses a file-sharing software, he "open[s] his computer to anyone else with the same freely available program," thereby "open[ing] up his download folder to the world." Id.