Because RAR is a proprietary format, you cannot open it natively in Windows or macOS without third-party software like WinRAR or 7-Zip .
A .rar file is a "container" that can hold multiple files or folders in a compressed state.
Compressed files from Google Drive should be treated with caution. While usually safe, cybercriminals sometimes use archives to hide malware. How to Use This File What is a RAR File - Cloudmersive APIs