WinSCP with local Network

I work now foe years successfully with WinSCP.
Now I changed my system. I have 3 Computers WinXP and Win7 and installed a BlackArmor Nas which I would like to use as data server.
Unfortunately this does nor appear on the left side because it is attached to the local network but not to any Computer.
Is there a possibility to use it with WinSCP?

But still, you should be able to map it to a drive letter. Aren't you?