You can create a hidden (Windows) share in OpenFiler (SMB/CIFS Share) by entering the “Override SMB share name” ending with the $ sign. Do not forget to restart (disable and enable) the SMB/CIFS service.
This actually changes the /etc/samba/smb.conf file to something like this (you can also do that manually):
[Backup$] comment = Backup path = /mnt/...../Backup ...
Note: Linux boxes always see ‘hidden’ Windows shares, only windows is hiding them.
obscurity != security