Compressed files can sometimes hide malware. Before extracting: with your antivirus software.
Because archives from unknown sources can carry security risks, it is essential to follow safe extraction practices: DA-NN-Preview.rar
If you are looking to write a story around this specific "lost" or "mysterious" file, here is a concept: The Story of the Unfinished Simulation Compressed files can sometimes hide malware
The file was found on a discarded drive in an abandoned tech lab. Inside "DA-NN-Preview" wasn't a game, but a Neural Network (NN) designed by a developer named David Aris (DA) DA-NN-Preview.rar