Based on common naming conventions in niche online communities, a file named "2021-Sept" likely contains:
Only download .rar archives from trusted bloggers. These file types are frequently used to hide malware or "bundleware." 2021-Sept.part3.rar
To access the contents, you must have all parts of the archive in the same folder. Opening just part3 will result in an error; you must usually start the extraction from part1.rar using a tool like WinRAR or 7-Zip . Context in Blogs Based on common naming conventions in niche online