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.

OpenFiler (OF) Hidden Share Screenshot. Click to enlarge.
(click to enlarge screenshot)

This actually changes the /etc/samba/smb.conf file to something like this (you can also do that manually):

comment = Backup
path = /mnt/...../Backup

Note: Linux boxes always see ‘hidden’ Windows shares, only windows is hiding them.
obscurity != security