: This indicates that the file is the 9th volume of a larger split archive. You cannot open or "develop" the contents of this file unless you have all the other parts (part01, part02, etc.) in the same folder. How to process this file:
: Ensure you have every numbered part of the archive (e.g., part01 through the final segment). GF131222-HOL-R1911.part09.rar
: This is typically a date or release ID (likely December 22, 2013 ). In many archival circles, "GF" can refer to specific release groups or content categories. : This indicates that the file is the