Solidworks File Exporting

[cadnoob]

Hey everyone!

This is me troubling you with a (stupid?) doubt. Hope you all will come to my rescue.

I am trying to export a complicated geometry as a STEP file from Solidworks, so that I can read it in Gambit. But when I tried this, I observed that the Gambit file had all the internal surfaces too(obviously). And hence, I have a lot of these small surfaces, which are inside the body and hence dont really matter. So its really difficult for me to attach size functions and do other operations because selection of the right faces becomes kind of difficult for me given the huge list of faces in the list.

Is there anyway around this? Can I just somehow export only the visible surfaces from Solidworks? Or should I try some other file format for this? Like IGES maybe(I dont know!)?

Thank you in advance.