Unlike standard ZIP files, Windows and macOS usually require third-party software to extract RAR archives:
Protecting sensitive information with optional AES-256 encryption and password-based access. How to Open It 21710.rar
Combining many different files (like a software project's documentation, code, and assets) into one downloadable item. Unlike standard ZIP files, Windows and macOS usually
Another free utility that supports extraction and management on Windows, Linux, and macOS. Security Warning Security Warning A is a proprietary archive format
A is a proprietary archive format used for high-efficiency data compression. The file "21710.rar" specifically appears to be a compressed "container" that can hold multiple files or folders in a smaller, single-package format. What is in a "21710.rar" File? RAR files are typically used for:
The official tool created by Eugene Roshal (the "RAR" namesake) for full management of these archives.
A popular, free, open-source alternative that can unpack almost any RAR version.