A little help?

I’ve been trying to put my character high poly from maya to unity, but when I put my character there’s no high poly, only the low poly… Please help…

Check if compression is on, and remove it. And plus, why would you want a High-poly model anyway? Low-poly models are more favored and will not melt your graphics card. It is a certain skill 3D modellers need - to be able to make a high-poly model low-poly. But, however, it seems like you already achieved this magically…