How do I separate these components?

https://preview.redd.it/ha60fu94p6lg1.png?width=2289&format=png&auto=webp&s=0a1ce1eaba8c95d8e873cc4ed22fc3610e25f01e

I'm new to 3D Experience, and I am having formatting issues with the model head frame I am going to 3D print. Additionally, due to the fact that the components are external geometry, I can't modify them. I would also love to know how copy the my model so that I can slice it down to printability.