It may be a compressed dump of information used for transferring data between specialized software applications. Recommended Safety Measures
However, a .rar file of this nature usually indicates a compressed archive commonly used for storing large sets of files together. Potential Contexts and Interpretations Elendos_Files_Database.rar
It is likely a proprietary or personal backup of a database ("Files_Database") curated by an individual or team named "Elendos". It may be a compressed dump of information