I have two XP computers and an OS X computer sharing a NAS drive on the same network. All computer see one another and all computers can access the NAS drive. However, the problem I am having is that when I use the OS X computer to transfer photos from a memory card to the a folder on the NAS drive, the XP computers cannot see the (photo) files. The XP computers can see that particular folder, however they cannot add a file inside that folder. It sounds like a permissions issue, but I don't know where to start to try to fix the problem. Please help!