Backup not working

This is fricking strange.. Tried EVERYTHING and all I got was error when testing connection.
My setup is like this.
PC 192.168.1.2
NAS 192.168.1.10
Backup shared folder on my PC, named server(192.168.1.2/server) to an USB HDD on my Ultra 4.


What got it to work was to skip "Test connection".

Step 1
Remote: Windows/NAS (Timestamp)
Host: 192.168.1.2
Path: Server (192.168.1.2/server, only got READ permission on folder so FULL permission is not needed)
Login/Pass blank

Step 2
Share: USB_HDD_1 (Connected to the backside of the NAS)
Path: _Backup

Step 3-4
Up to you to choose.

SKIP trying the "test connection", it's is severely broken. Just write in all the info as it's supposed to be and start the job.
And Remote: Windows (Archive bit) didn't work.

Hope this can help some people. Wrote it as simple as possible for all to understand.
Was on the verge to pull my hair out!!