Backup server through WD Software

Hello!

I have WD Smartware 1.6.0.25. I need to backup a local server, which I normally connect to through WIFI. When I open the program it is only possible to choose between C and D disk, no external N disk (name of my server). Does anyone have any ideas what the problem is alternatively what program which can solve my problem, thanks for any reply.

ossa_stl

The software will only backup drives directly attached to the PC

But it is through USB. Should not that work? Do you have any other suggestions? Thanks for reply!