Does hide sub-folders and files from users without permissions work?
'Hide sub-folders and files from users without permissions' does indeed hide data within the share. I think I might be agreeing with @Seaprobe. "Hide this shared folder in "My Network Places" does hide the folders on a Mac (10.15.5 Catalina). It hides them from all users, including those who have permission to access them.
How to hide shared folders?
1. You can hide the shared folder itself in Network Places (which is what you referred to). 2. Right below that is the option to hide subfolders and files for users with no permissions. This option works for Windows Clients as well as for people who log into FileStation. I just tested it succesfully.
What if a user cannot access a shared folder?
No access: The user or group cannot access the files or subfolders in the shared folder. Click OK to finish. When there is conflict between the permissions assigned to the user and the group they belong to, the permissions are determined by permission level in the following order: No access (NA) > Read/Write (RW) > Read only (RO).
How do I grant or deny permission to a user or group?
Type: Choose Allow or Deny to grant or deny the permission to the user or group. Apply to: If you are creating a permission entry for a folder, tick the checkboxes to apply the entry to this folder, the folders (or Child folders) or files (or Child files) in this folder, or all files and folders contained in this folder (or All descendants ).
CLI Administrator Guide for Synology NAS