Hi Frantisek,
Sorry for the inconvenience caused.
By default, we couldn't choose an empty directory from the Uploader component because none of the events would be triggered at that moment. The HTML 5 File Upload component has been added to the Syncfusion Blazor Uploader component. When uploading an empty directory to the HTML 5 Upload, this is the default behaviour.
So, please share the use case for detecting empty directory in the Uploader component this information will help us to check and proceed further from our end.
Regards,
Berly B.C