How to export selected parts of large assembly?

Hello,

I want to export only the exterior of my model. When I select the parts in the model and hide the others, the export function tries to export everything and the software freezes.

What is the most efficient way to select only exterior visible parts and then select and export them?

Thank you

Edu ​​​​​​​3DEXPERIENCE ​​​​​​​CATIA ​​​​​​​