...its all connected via ethernet both mac mini and nas...
...i can open the files in the nas ok on the mac mini...
Great! Those two nuggets answered a question that I asked and one that I was about to ask.
seemed to have set the NAS up but one problem i have is my external WDblack drive that i download to asks for password every time then fails to download due to permissions ?. how can i just download straight to it please.
i am the only one in the house that uses the computer yet it ask for passwords in finder also . now that i have set up wd my could as timeshare it won't let me delete the timeshare folder on my other external drive i don't have permissions ? i knew how to do it in win7 but lost on osx ?.
Have you tried repairing disk permissions yet? If you have not, I suggest that you do so.
I have one more question about your NAS. You can read files that are located on the NAS. Can you also write to your NAS?