Without opening the file, it is impossible to know for sure, but files with this naming convention typically include:
: This could represent an hour (3 AM) or a version index. r : Commonly indicates a revision or a release version. v_2016-01-02-03r.7z
Note: As this is a generic file name, it is likely specific to a custom application, proprietary software, or a local backup system, rather than a standard public file. Without opening the file, it is impossible to