No settings to stop mousepad from working if mouse plugged in

I have searched all the internet, but nothing works. I go to settings, all there is in mousepad is it's sensitivity. please help. I even looked on the page on this website for help but NONE of them worked. Please find a way. Also, please dont say something that i clearly already did.

Hi, I believe this is what you're looking for?

Attachment 139509

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