Is there a way to break a part into various smaller parts?

I just imported a part assembly from autocad to solidworks using a dxf file. For some reason the model is coming out as one big single part, as opposed to an assembly of different parts. The model is pretty complicated, so reassembling it would be very time consuming. Is there a way to make individual sections of this big part as parts themselves. As in, transforming our big part into various smaller parts for later assembly?SolidworksAssemblies