Fn (1).rar -
A file named is a compressed archive created using WinRAR . The "(1)" in the filename typically indicates that it is a duplicate or a second copy of a file originally named "fn.rar".
: Another common tool for managing various archive formats . Common Uses for RAR Files How to Open RAR Files on Windows, Mac, and Mobile - Avast fn (1).rar
To access the contents of this file, you must it using specialized software: WinRAR : The native application for this format. A file named is a compressed archive created using WinRAR