After 4 weeks of intense investigation into the poor streaming/connection we have been experiencing, I discover that my Samsung Galaxy A51 has been uploading continually to Samsung Cloud. This started around 24th April which is when the poor live stream quality started. I am assuming this is something to do with the move to OneDrive, but I still haven't resolved why. In the past 4 weeks, my wifi data usage has gone from a total of 60GB a month, to 462GB, of which 405GB was in the background to Samsung Cloud. The only way for us to live stream our teaching is to switch the phone to Flight Mode as I can't find a way of removing Samsung Cloud. I would remove the whole profile, but there are parts that I would like to keep. I'm ringing Samsung Account Support on Monday to see if they can offer a solution.