The disk sharing offers no real auth, either you have a password or you don't, and if you don't, you can set that either people can do nothing, read, or read/write. There is no way to set up mutiple users, or set various permissions. IE; I can't set up the device so that My wife and I can update the advaible music on the drive, my daughter can play music, but not delete it, but not access other material on the drive. I had hoped to replace my mac mini, (which is used 99% for disk sharing.) But, doesn't look like it's gonna work out. Also, I had really hoped for upnp for the router aspect of it... Again, another let down. I'm used to apple being open and supporting everything, and I just don't feel that way about this product. I am probly going to return it and get another linksys once openwrt supports them.