On this forum you are sorrounded by people with backgrounds in data storage and networking. Any one of them will tell you there can be no reliable “forensic” assurance the data was not copied somewhere by any number of methods, even for a recent timeframe, let alone 5 years ago. It’s a ridiculous idea on its face.

So you yourself have no expertise but are still going ahead with making an assertion and your bet is that if you are wrong others will pile in.

At least try to be reasonable.

no, myself included.