I have a LaCie network attached storage. I'm getting a Access Denied error whenever I'm trying to copy or delete a file from the NAS. There was no settings to enable this in the config menu of the NAS.

I'm thinking it was the new firewall and antivirus (Comodo Internet Security) I installed a couple of days ago that caused this. But I already put the NAS in the trusted zone and I still can't copy a file into it. I also tried to disable the firewall and still no effect.

What else should I check?