Thanks! I'll try it out tonight!
Tried. It works with USB dongles only, Will not work with the 32/64gb sd cards. The only SD card it will use is the card that came with the PI400. So there is that. I'm not sure what the issue is. I can't reformat the SD cards anymore. I backed up the USB with Macrium Reflect - deleted the partitions on the SD card and performed a restore (which Macrium Reflect reported the partitions deleted) but when the restore completed, the SD card still had the old data on it.
Gonna keep trying - but I think Albert E would be shaking his head and muttering about me at this point.