@ArcherC8 Thanks. However, nothing looks amiss in Activity Monitor. Nothing else is sending any data of any significance at all on the Network and there's plenty of memory and CPU bandwidth. I also...

I'm getting 455.5 Mbps when I do a speed test using the Tether app and yet while uploading large video files via wifi with my MacBook Pro within clear line of site to the router only 20 feet away I'm...