Project not there but optimized media still exists

Hi everyone!
This is my first post here so please be gentle

I created a new project, dragged in all my media and generated optimized media. What I didn't see was, that my internal ssd was full after doing so. I tried to save the project but couldn't. So I closed Resolve without saving and now I don't know where to find and delete the project and the optimized media.
When I tried to start a new project with the same name I got the notification that this project already exists, even though I couldn't save it before and it doesn't show in my home menu either.
Now I got a bursting full drive and can't delete the optimized media.
Help please!

Have you completed any training for Resolve yet? The Beginner's Guide and Advanced Editing are an excellent groundwork to get you moving smoothly.

https://www.blackmagicdesign.com/produc ... e/training