Hi there, I see this post now ... and I ahev the same issues with SD card support on my Dahua Camera.
I have an IPC-EBW81200 and an SD card inserted, but after some time of recording, the SD card is just not recognized anymore.
... I am still looking for a solution to "reset" the camera completely.
Tried to reinstall a firmware, but this doesn't reset the camera to factory settings.
... and I do not really want to dis-mount the camera from the wall to check this now ...
I have an IPC-EBW81200 and an SD card inserted, but after some time of recording, the SD card is just not recognized anymore.
... I am still looking for a solution to "reset" the camera completely.
Tried to reinstall a firmware, but this doesn't reset the camera to factory settings.
... and I do not really want to dis-mount the camera from the wall to check this now ...