writing to an SMB share

Hi

I have just built a freenas box using the parts left over from a PC upgrade and it seems to workm however I am struggling with a basic requirement, I am not very technical so I'll do my best to explain.

I have set up a couple of shares and I can map a network drive to them from a pc so I know they exist, however, I cannot write data to them from my pc.

I realize this will be user privileges thing and I dabbled with making a guest user and adding write privileges and then assigned that...

writing to an SMB share