I'm pretty new to 3D printing and I made my own file in Blender. I exported it to Creality slicer, printed it, and it was filling the holes that aren't supposed to be filled.
It's supposed to look like this:
but ends up looking like this:
I looked around and saw that it might be broken or something so if anyone knows how to fix that Heres my stl file:
https://drive.google.com/file/d/1auVJb8xFT_33rf3gDXCzf5Hz6K9TvfSv/view?usp=sharing