Last week, EFF, ACLU, and ACLU of Minnesota filed an amicus brief in State v. Pauli, a case in the Minnesota Supreme Court, where we argue that cloud storage providers’ terms of service (TOS) can’t take away your Fourth Amendment rights. This is the first case on this important issue to reach a state supreme court, and could mean that anyone in Minnesota who violated any terms of a providers’ TOS could lose Fourth Amendment protections over all the files in their account.

The facts of the case are a little hazy, but at some point, Dropbox identified video files in Mr. Pauli’s account as child sexual assault material and submitted the files to the National Center for Missing and Exploited Children (NCMEC), a private, quasi-governmental entity created by statute that works closely with law enforcement on child exploitation issues. After viewing the files, a NCMEC employee then forwarded them with a report to the Minnesota Bureau of Criminal Apprehension. This ultimately led to Pauli’s indictment on charges for possession of pictorial representations of minors. Pauli challenged the search, but the trial court held that Dropbox’s TOS—which notified Pauli that Dropbox could monitor his account and disclose information to third parties if it believed such disclosure was necessary to comply with the law—nullified Pauli’s expectation of privacy in the video files. After the appellate court agreed, Pauli petitioned the state supreme court for review.

The lower courts’ analysis is simply wrong. Under this logic, your Fourth Amendment rights rise or fall based on unilateral contracts with your service providers—contracts that none of us read or negotiate but all of us must agree to so that we can use services that are a necessary part of daily life. As we argued in our brief, a company’s TOS should not dictate your constitutional rights, because terms of service are rules about the relationship between you and your service provider—not you and the government.

Companies draft terms of service to govern how their platforms may be used, and the terms of these contracts are extremely broad. Companies’ TOS control what kind of content you can post, how you can use the platform, and how platforms can protect themselves against fraud and other damage. Actions that could violate a company’s TOS include not just criminal activity, such as possessing child sexual assault material, but also—as defined solely by the provider—actions like uploading content that defames someone or contains profanity, sharing a copyrighted article without permission from the copyright holder, or marketing your small business to all of your friends without their advance consent. While some might find activities such as these objectionable or annoying, they shouldn’t justify the government ignoring your Fourth Amendment right to privacy in your files simply because you store them in the cloud.

Given the vast amount of storage many service providers offer (most offer up to 2 terabytes for a small annual fee), accounts can hold tens of thousands of private and personal files, including photos, messages, diaries, medical records, legal data, and videos—each of which could reveal intimate details about our private and professional lives. Storing these records in the cloud with a service provider allows users to free up space on their personal devices, access their files from anywhere, and share (or not share) their files with others. The convenience and cost savings offered by commercial third-party cloud-storage providers means that very few of us would take the trouble to set up our own server to try to achieve privately all that we can do with our data when we could store it with a commercial service provider. But this also means that the only way to take advantage of this convenience is if we agree to a company’s TOS.

And several billion of us do agree every day. Since its advent in 2007, Dropbox’s user-base has soared to more than 700 million registered users. Apple offers free iCloud storage to users of its more than 1.5 billion active phones, tablets, laptops, and other devices around the world. And Google’s suite of cloud services—which includes both Gmail and Google Drive (offering access to stored and shareable documents, spreadsheets, photos, slide presentations, videos, and more)—enjoy 2 billion monthly active users. These users would be shocked to discover that by agreeing to their providers’ TOS, they could be giving up an expectation of privacy in their most private records.

In 2018, in Carpenter v. United States, all nine justices on the Supreme Court agreed that even if we store electronic equivalents of our Fourth Amendment-protected “papers” and “effects” with a third-party provider, we still retain privacy interests in those records. These constitutional rights would be meaningless, however, if they could be ignored simply because a user agreed to and then somehow violated their provider’s TOS.

The appellate court’s ruling in Pauli allows private agreements to trump bedrock Fourth Amendment guarantees for private communications and cloud-stored records. The ruling affects far more than child sexual assault material cases: anyone who violated any terms of a providers’ TOS could lose Fourth Amendment protections over all the files in their account.

We hope the Minnesota Supreme Court will reject such a sweeping invalidation of constitutional rights. We look forward to the court’s decision.