I unfortunately am stuck in the same loop I've been in since getting the Mavic. I have never had a firmware take. The RC will, but the mavic just fails each and every time. I had restored factory defaults, I've tried with the app, I'm now using the assistant. Literally just failed again while I was typing this message. There goes attempt 3. What am I doing wrong?
Advice : worked for me, have been failing 17 times. all failed. Changed USB cable for a basic one (no platimium edition, or short edition) ... worked straight away. Keep battery 100% charged