grsync samba directories

"rsync: failed to set times on"
This message appears when trying to rsync (through grsync) Samba directories from within the same PC from one disk to another keeping all (user,group,permissions etc) the same.
This is because simple user does not have some permissions in the samba directory.

Solution:
use a terminal and type
gksudo grsync
(will prompt for user's password and will open an grsync as root so everything will be copied correctly)