OK, it finally worked when I tried TFTP from the laptop. For some weird reason the PC was not good enough for the downgrade.
What is the next step?
"System update completed" but SAPD still cannot see the camera...:sad2:
Last night I upgraded my Chinese camera bought from here from firmware 5.2.0 build 140721 to 5.3.0 and it bricked.
I have tried TFTP (using @whoslooking's 5.30 downgrader folder) to downgrade it to 5.2.5 but it just cannot grab it.
TFTP stays forever in the initialized mode (see uploaded...