Hello,
It sounds like you're trying to establish a file sharing connection between your PC and Mac over the same local network. Here are some steps to troubleshoot:
1.On your Windows PC, go to Control Panel > Network and Sharing Center > Advanced Sharing Settings. Make sure that "Turn on network discovery" and "Turn on file and printer sharing" are enabled for the private network profile. Also, consider disabling password protected sharing if you want to connect without a specific user account.
2.When connecting from your Mac to the PC, you need to use the username and password of an actual user account existing on the PC.
3.Make sure both devices are connected to the same network segment, either wirelessly or wired, and they can ping each other by IP address or hostname.
4.Ensure that the folder you're trying to access on the PC has proper permissions set for the user you're logging in as from the Mac.
I hope this helps!
Best regards
Zunhui