That seems be the case. I am a state government worker, and we are warned not to use personal devices (or personal services like our personal email accounts) for work purposes, most especially if there is a possibility that data may be saved on that device either intentionally or unintentionally. (Actually, as an IT professional, I’m usually the one warning other people about that.) The reason is because if there is an investigation into wrongdoing on your part, or even if there is just a disclosure request, we are required by law to provide anything we have that might have work-related data for discovery purposes. If you texted someone from your personal phone, you might have to give that up temporarily. That just goes with the job. I imagine a subpoena works the same way. Your right to personal property is secondary to the pursuit of justice under the law.
It’s also the reason why you have to let people into your private space if there is a warrant.
Oh no! It has already begun!!! 