Finally found the answer.
Two problems.
1. Blink system failed when switching network to eero Guest network with "Incorrect Password" message returned when connecting to Blink servers. This refers to the Guest wifi ssid Pwd. Which in my case was correct.
2. I tried a second sync module, that didnt exhibit the problem above and connected perfectly. This failed to store any clips to the connected Flash drive.
Both issues were not apparent when using the main wifi network. That worked perfectly.
Both these issues were corrected by a F/W update. My blink app had no f/w update link either auto or manual and I struggled to find the process anywhere.
F/w is updated by pressing the reset button on the Sync module and then plugging the micro USB power plug into the
unit. The red light starts to flash repeatedly after which you can release the button and let it do the f/w update before it returns the
steady green and flashing blue light that you need to start the wifi ssid change process.
Note eero support suggested putting the eero6 into legacy mode and disabling 5g temporarily.
to do this ....
On the eero app go into settings.
Troubleshooting
click my device wont connect
click my device is 2.4g only and Temp pause 5g
click my device cant detect wifi 6 and enable Legacy mode for the duration of the wifi change process.
I dont think either of these are actually necessary if the f/w is updated but worth doing for best practice.
Follow the Blink change wifi process and all should be good.
Hopefully this will save you the time I spent talking to eero and Blink support before I stumbled onto the solution
in the Blink community pages.
