OK. Quick and dirty. <> Mac OSX 10.5.1 <> Linksys WRT600N router, NAS drive attached. <> 200GB Maxtor Drive <> MacBook Ultimate, Wired 1GB <> Using admin user I connect by opening finder, Connect to server. SMB://<ipaddress> A default share is created, the folder exists. I enter as registered user, and supply admin user and password. The share connects. I can read files, I can delete files, I can create a folder which disappears immediately until I disconnect and reconnect. I cannot copy files to the share. It tells me the file contains one or more items for which I don't have permissions. I have reformatted, rebooted, etc, etc. I am able to connect the drive directly to my Mac and no issues. I can connect to the share using a windows pc, same user and password with zero issues at all... copy, delete, rename... no problem. Am I missing something? Edit: When I say Windows PC, I mean Windows XP running in parallels on the same mac that has the issue.