The file is a .rar archive, a common format for compression, requiring software like WinRAR or 7-Zip to extract.
Prior to extraction, it is recommended to run a security scan on the file with updated antivirus software to ensure its integrity, particularly if it originated from a third-party source.
The designation suggests it is a specific, serialized asset, likely part of a larger collection (089) or a specialized data set (21308).
Frequently used in engineering and CAD databases.
Without opening the file, the name is characteristic of: 089_21308rar