The rule is this:
If someone finds a classified, or other government document in their possession at their homes, or elsewhere as in a bathroom by Olivia Troye, that document is to be returned. No charges will happen.
If there are documents and the person does not care to return them, as it happened in August 2022, then it become obstruction.
If one receives a subpoena to return the documents and does not, it is obstruction.
If one moves the documents around, so that they will not be found, that is obstruction.
This has been explained again and again on tv, online, etc.