The Logging level goes from the least verbose (0, logging disabled) to the most verbose (5,verbose logging). The latter is useful when needing assistance to solve an issue with FileZilla Server.
The log can be directed to two different destinations: the standard error channel, or a file. In case a
file is chosen, you need to also set the full path of the log file.
If you want log files to be rotated select File rotation is enabled from the top-down menu. Log file will be rotated either on a daily basis or if the file has reached the specified maximum size.
By default, the maximum number of log files is set to 1, enter a different number to set it. The Maximum file size is set to the maximum possible, enter a different number to set it.