Permission error if uid | gid is not urbackup user in CentOS 7

Hello Folks!

I’ve started using UrBackup Server 2.0.33 in CentOS 7.2

In my server I have 2 HDD. First is for System.

Second is for storage: 3Tb NTFS GPT Sata Hdd.

There is a group “smbgrp” with 3 users: share, urbackup, transmission

In my /etc/fstab I have:
/dev/sdb2 /mnt/storage ntfs-3g context=“system_u:object_r:samba_share_t:s0”,uid=share,gid=smbgrp,umask=0002 0 0

So Ls show this permissions in /mnt/storage: drwxrwxr-x.

But, when I choose Backup Path in Server Settings: /mnt/storage/Backups I got Permission denied (code: 13)

At the same time user share and transmission is working well, they can read/write to /mnt/storage.

If I change in mount options uid=urbackup when all working, all 3 users can write.

But again, if I change uid=share, gid=urbackup - samba working & urbackup working, transmission no write permissions according.

I tried the same concept on my System hdd(XFS) and the result was the same.

Is it UrBackup work this way or is it something else?