auditing file deletions

I am trying to turn on auditing on file/folder access.
I have edited the domain security policy to enable object access auditing
I have edited the local security policy to audit the same thing. But I keep seeing the effective setting in the MMC as’no auditing’.
Then I changed the default GPO to enable auditing but still nothin.
There is ‘no auditing” in the local security policy as the effective setting, and consequently there are no logs in rhe security logs.
How can I enable auditing ?