.fbx models

Hello, I have a bunch of .fbx models. They are about 6 mb or so. When I import them, they become 150-200mb.

Am I doing this wrong?
If so, how can I do it right?

Or does game studio use a odd or large form of models?
if so, how can I use other types of models (maybe using .dll?)

Thanks!

Are you importing them into WED or MED?

Are there bones? Vertex animation?

From which application did you export the fbx's?

I am importing them in to the lite-c med,
There are animations, about a 800, and they are vertex.
I don't know, I didn't make the model.

Any advice?

800 animations! If that’s true, that’s a lot of data if they are vertex animations... An average .MDL with out animations should only be a few hundred k under about 200k if you use an external skin. Models with 800 animations are pretty much unheard of in a game. A lot of Vertex animations will lead to a bloated .MDL file… which is one of the reasons why bones animation is often desirable.