Public Folder Sharing in Windows 10
The Public folders are a convenient way to share files on your computer. You can share files in the Public folders with other people using the same computer and with people using other computers on your network. Any file or folder you put in a Public folder is automatically shared with the people who have access to your Public folders.
The Public folders contain subfolders to help you get organized, but they don't contain any files until you or other people using your computer add files to them. The folders are organized by content type, and include:
Public folder sharing is turned off by default (except on a homegroup). When Public folder sharing is turned on, anyone on your computer or network can access these folders to open and view the files stored there just as if they were stored on their own computers. If you give them permission to change files, any changes they make will change the files on your computer.
When Public folder sharing is turned off, only people with a user account and password on your computer can access them.