Upgrade StorageChromebook
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It is strange because it should be there.
To maximize time, you can add this extension to the browser: https://chrome.google.com/webstore/detail/connection-forwarder/ahaijnonphgkgnkbklchdhclailflinn
After this is installed, add the port info.
If it still does not work, maybe a zoom session to clarify things.
My Chromebook is in French, because I'm french and it's easier for me