The name "part09" indicates it is the 9th volume in a set. You cannot extract this file alone; you need (e.g., part01 through part09) in the same folder to successfully combine and open them. Step 1: Gather All Parts
Windows cannot open RAR files natively without third-party tools. The industry standard for .rar files. M&B2BBDD.part09.rar
A free, open-source alternative that handles multi-part archives well. Step 3: Extract the Files The name "part09" indicates it is the 9th volume in a set