Hi, I have an external HD with both USB connection as well as FireWire. Most of the time it is connected via USB to my Airport Extreme -for wireless convenience - but sometimes, when i'm in my office (which is out of range from the AE) i connect it directly to my MacBook Pro via firewire. That's when i get issues. I'm having trouble for example, with my iTunes Library that is on this disk. When connected directly, iTunes says it can't access the library, because it has no permission to access the disk. When connected wirelessly, when this same disk is connected to the Airport, all works fine. http://cdn.macrumors.com/vb/images/smilies/confused.gif Even though it is the same disk with the same name, i get messages that i don't have permissions to access some data etc. I noticed that when directly connected, it is seen as a volume, when connected via Airport it is seen as a share. I'm trying to understand why this happens, i hope someone can explain? What can i do to resolve this and access all data, no matter which connection i use?