Explanation:
Box 1: Performance Counter properties
In these properties on tab "File" you find option "Log mode" with following checkboxes: Overwrite, Append, Circular. Settings which you make in Data Manager tab will be applied only when some conditions will be fulfilled (too big root dir, too many subfolders, too less free space on disk) Box 2: Data Manager Change the default settings when you configure a Data Collector Set on the Data Manager tab.
For example, change the Minimum free disk space or Maximum folders setting
https://docs.microsoft.com/en-us/troubleshoot/windows-server/performance/log-files-are-deleted