Since the "SA" in your file name often refers to a release group or specific language track, here are the stories for the two most common movies with that title: 1.
A man who can transform into a massive, machine-gun-wielding bear. subtitle The.Guardians.2017.720p.BluRay.x264-SA...
The specific file name you're asking about, The.Guardians.2017.720p.BluRay.x264-SA , likely refers to one of two very different films released that year. Since the "SA" in your file name often