Unfortunately, rar file is not allowed while the zip file exceeds the allowed size.
Could you maybe try to split the contents of the diagnostics into 2 folder and just upload 2 zipped folders.
Or maybe upload the zip file in the dropbox or other file hosting services and just send us the download link.
Thank you very much for sending the diagnostic logs.
Could you please check if you can add spacedesk or C:\Windows\system32\spacedeskService.exe on your Avast Firewall setting’s exception list to allow incoming and outgoing connection.
Then try again if it will fix the spacedesk discovery.
1. USB Tethering connection
If your phone supports USB tethering, you can try to establish a private network connection via USB tethering and connect spacedesk over it.
For instructions, please check the Performance Tuning -> Network Bandwidth -> USB Tethering chapter in the user manual.
2. Android Debug Bridge Cable connection
For instructions, please check the Performance Tuning -> Network Bandwidth -> Android Debug Bridge Cable chapter in the user manual. https://forum.spacedesk.netuser-manual/
FYI: Native Android USB cable connection is not yet supported.
But will soon be available in the next few months.