I’m not quite sure what you’re looking for with that specific file size. Depending on what you’re trying to do, "Download 765.1 MB" could refer to a few different things:
you found online and want to verify for safety or contents. Download 765.1 MB
Could you let me know which of these you were interested in, or provide a bit more about where you saw that number? I’m not quite sure what you’re looking for