Animation Clips Creation and FBX

I searched for the answer, and I can't find one.

This should be really easy. I've created multiple animations in Maya, and exported the mesh as an FBX. I bring it into Unity, and use the split animations option to try and create animation clips. When I click on apply, no clips are created.

If I use a Maya file, I can create animation clips just fine. I'd rather use FBX, because I'd imagine it's cheaper memory wise.

Is it not possible to create clips from a FBX?

Maybe you forgot to enable export of Animation when exporting manually from Maya to FBX? Then Unity would have nothing to split so it wouldn't produce any animations.