Hello! It would look like the split feature will do the job. To use it, go to Insert > Features > Split... Then select the sketch you want to cut the part with (in your case the circles). Next click "cut part". The part will be split into separate bodies (you can double click and assign file names to save the bodies as separate solidpart files if desired). Next convert to an assembly (instructions: Assembly from Part – No mates required – Boxer's SOLIDWORKS Blog). Finally save the assembly as an STL. Make sure to go into the STL save options and verify that the "save all components in a single file" option is NOT selected.
Josh Campagna wrote:
...I've attached the part
I do not see a part file (*.sldprt) attached here - only a mere image file.
Can you attach the part file?