RAR Archive (proprietary format developed by RARLAB ).
Since there is no widely known software or legitimate product specifically named "Fruid.rar," it is highly likely that this is either a private file, a niche project, or a potentially archive. If you are reviewing an archive file you received, Draft Review: Fruid.rar Fruid.rar
Generally used for high-ratio data compression, file spanning (splitting large files), and password protection. Critical Security Warnings How to open and extract rar files on Windows 10 pc? RAR Archive (proprietary format developed by RARLAB )