I tested it by deleting a prompt, deleting the JSON file from Drive, and emptying the Trash. The file was fully gone.
Then I used Google’s official recovery tool.
The JSON came back — and the model instantly continued the conversation with full context.
This is only possible if the server‑side session and conversation were never deleted.
I recorded the entire process in 3 videos:
I also posted this finding under two official Google videos featuring Guillaume Vernade, so Google is aware of it: – https://www.youtube.com/watch?v=BcWFc3H7Khg – https://www.youtube.com/watch?v=LBQfNbPCxQw
Raises questions about data retention, transparency, and GDPR compliance.