Does Viññāṇa generate Nāmarūpa in the sense that would make "uploading concsciousness" impossible?
I don't understand the question. I just try to help. I write this answer by my guess the question's meaning.

The past (vanished) moment does not "upload" anything to the moment which it affects. It just causes its effect to arise. However, the effects are able to arise as the same habit, e.g. same object and same feeling, because of Upanissaya Paccaya.

The vanished moment is hypochondria. It cannot pass or upload anything to the future, although it still is able to cause new moment effects.

For example, I can smile when I thinking of my dead sister however she vanished and doesn't upload anything to me, she just causes me to smile.