Make this file private/Attach this file to is used to determine who has access to the file. In this case, it would be “Current User”.
I think you’d like to autobind the file to the User’s Utility field instead so it saves automatically? To do this, you can place the file uploader in a group (type: User, data source: Current User), then select Enable Autobinding for the file uploader element.
You will then see a message stating that you need to setup a privacy role to ensure that the User has the correct permission to use auto-binding, such as:
Back on the page, once the file uploader is placed in a group, you’ll have the option to select the Usage Utility field:
This will automatically save the file each time it is uploaded.