Because this is not a recognized historical or pop-culture event, its "story" would likely be specific to the person or group who created it. Common possibilities for such a file name include:
I should also check if there are any public repositories or archives where such a file might exist. Maybe GitHub, SourceForge, or other code hosting sites. If "nchsk19" is a project name, looking there could help. Alternatively, maybe it's a dataset or a game mod.
Because there is no definitive public information or documentation for this specific string, it is not possible to write a factual or authoritative article about it. Why a topic might have no public record:
80 km long six-lane Gorhar – Khairatunda – Barwa Adda section