1. create a folder to mount the share in /mnt - either open /mnt as root and add the new folder or type
sudo mkdir /mnt/newfoldername
2. edit the fstab file, either open the /etc folder as root and double click on the fstab file or type
sudo xed /etc/fstab
//192.168.2.1/volume(sda1)/ /mnt/Toshiba cifs rw,nofail,x-gvfs-show,uid=1000,gid=1000,guest,users,vers=1.0 0 0
id -u username
id -g username
3. Save the fstab file and close down the editor, as soon as you've done that the named drive should appear under Network in Nemo.
And that's it, the named drive will have your username permissions, so you won't have to bother with passwords.
To use the new named folder in FreeFileSync, simply browse to the folder like you would any other local drive.