# RollingFileAppender | Property | Type | Required | Default | Description | | --------------- | ------- | -------- | -------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------- | | filePath | string | true | --- | The location of where to store the log file | | filename | string | false | Name of the Appender | The name of the file, if not defined, then it will use the name of this appender. Do not append an extension to it. We will append a .log to it | | fileEncoding | string | false | utf-8 | The file encoding to use, by default we use UTF-8 | | autoExpand | boolean | false | true | Whether to expand the file path or not. Defaults to true | | fileMaxSize | int | false | 2000 (2MB) | The max file size for log files. Defaults to 2000 (2 MB) | | fileMaxArchives | int | false | 2 | The max number of archives to keep. Defaults to 2 | > **Info** Please remember to set the `autoExpand` property to FALSE if you will be using an absolute file path location. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://logbox.ortusbooks.com/usage/appender-properties/rollingfileappender.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.