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Any chance on an update for the Marlin 2.0 bugfix source? The Sd2Card.cpp has changed a bit, so identifying where to modify is a bit hard...
I wonder - if I transfer files/directories to the SDcard via WiFi - will Marlin automatically re-read the filetable every time I enter the SDcard menu - or is the folder contents read every time you enter a folder? It would not be optimal, if one had to remove and re-insert the card after a file transfer :-)
If running with dual z stepper drivers, the last driver probably needs to be connected to AUX1 - but which pins to use for RX/TX (available pins are A3, A4 - as D1 and D2 most likely is used for serial communications on the USB port) ?