HDRI files to PC from Theta Z1

I’m using the HDRI plug-in set to exr and recording a still. When I plug the usb cable from the Z1 into my mac, it doesn’t mount as a drive. I’ve tried several cables and several OS machines. I also don’t see any files labeled exr in my device or theta using the mobile app?
How can I retrieve the exr files?

Thanks so much,
Andrew