Sync many files slow ? Android11

[leder11011]

As you can see in the last comment w/ the screenshot of this post:

Syncthing detects devices, but does not sync folders

I have syncthing w/: ubuntu box android smartphone added fw rule syncthing detects devices but does not sync my folders! Any idea? These are the ubuntu logs: I wanted to add my logs here, but the forum prevents me from doing so! https://www.file-upload.net/download-14488640/syncthing_syslog.txt.html

OP 8pro is my Android 11 smartphone!