How to synchronize two local folders

I am using an unraid system and have mounted a 115 network disk as a local disk through clouddrive2. I want to automatically synchronize the updated contents of the 115 network disk and automatically download them to the local disk, but I don’t know how to do it. The tutorial is to find the device in the share, but there is no device in my share. I don’t know how to deal with this. I hope an expert can give me some advice!

I’m not 100% sure I understand the problem you’re having. If you are wanting to synchronize two folders on the same host, my advice is not to do that with Syncthing. I’d recommend that you use something else for that.