There are some who say that after using a FW bin file via SD card to update - it should be deleted. Sorry but that IMHO is wrong. Why ?
The bin file is used by the AC to update any battery that is installed and needs updating. Take away the bin fiile from the card and what does it use ?
Even if you update via Go .... the SD card will carry a copy of the new bin file.
As to OP's apparent drop back of FW on his machine ... very strange as most people cannot get FW to backflash past 1.07.009 from 1.8.10 ..... not that anyone would want to !! especially to 1.6.08 .... one of the worst FW !!
Nigel
I just checked my sd card and it seems that my bin file has been deleted, now i never deleted it specifically but i did format sd card as advised by the dji go app, i also formated it via the app, now when my new battery arrives will i have the same issue?