What a file hash shows.

The local check computes SHA-256 from the file bytes in the browser. The same hash on two files means the same bytes. A different hash means different bytes. The check stops at 250 MB per file.

The check does not change the file and does not upload it. A Mirvio variant export is a separate job. That job makes a new file from a source you may use. One request stops at 10 variants.

A hash does not predict a platform review. A new file does not guarantee reach, approval, or a lower ad cost.