And the permission is as follows: [myuser@hosting_server]$ getfacl foobar # file: foobar/ # owner: myuser # group: another_user user::rwx group::rwx mask::rwx other::r-x Here we want to remove the ACL permission and the plus sign at the last of the permission list. The funny fact is that from host (not from jail) I can write in the folder. ; List folders/Read data: This controls whether a user can . Active Backup for Business Technical Specifications - Synology Generates reports on customized schedule to track the overall backup status. DSM provides the flexibility to set data quota on individual user, volume, or shared folder. Supports viewing and adjusting ACL permissions of files and folders; Supports Windows ACL editor; Supports customizing shared folder attributes to be displayed; Provides an interface to edit music information of audio files; Supports management of files and folders stored on Synology NAS, including: Creating, renaming, or deleting file and folders Setting up Windows ACL Settings - Synology If permissions are not set up using Windows ACL from Windows File Explorer, new ACL settings will not be stored in the . PDF Setting up Permissions for access to Subfolders on the NAS Here's how to do it with the Windows Security Log. The Permissions seem to be un-intuitive in the extreme with (on the latest) I have completely failed to even set up a share with SAMBA permissions. . It will save a file that is either corrupted or empty. One of the shares does not let users save to it although the permissions are set for the user to be able to save to it. Also note that the SYNOLOGY NAS have the Windows Permissions activated. And also, in the syno knowledge base, i found this article on how to enable these ACL permissions. Obviously it is not feasible to grant permissions per user in a business environment.