On 05/08/2016 12:03 PM, nikos sarantopoulos wrote: > but what permissions i should set to this image > connected to a loop device Ignore the fact that the filesystem is on a loopback device. You will set permissions exactly the same way you would for any other directory. Generally: create a group of users in Samba AD, add the appropriate Samba AD users to the group, allow the group read/write access to the directory, and set the SGID bit so that group ownership is inherited from the parent directory.