appears to be a file containing custom content for The Sims 2 , specifically a set of kitchen cabinets.
According to sims2repositoryfinds on Tumblr , this archive includes: UPPERS.rar
: These are functional in-game counters that come with decorative upper cabinets pre-attached. Compatibility : Designed for Base Game ( BG ) use. Creator : Attributed to the creator dgandy . rar file? appears to be a file containing custom content