User Activity

I tried everything I can think of.  The card has been working fine but I connected it to my new laptop using a Dell Thunderbolt docking station.  I’m not 100% certain this caused the problem, but nothing else was changed.  I shot 260 images yesterday...
I'm using the Sigma 150-600 Contemporary with an EF-R adapter on my R5 and R6.  It worked fine, until I upgraded the camera firmware to the latest version.  Since then, I get an Error 01, "Communications between the devices is faulty.  Check the came...