I had an issue last time sharing my Attached HDD on my Airport Extreme with my apple tv and i saw a bunch of people how they did it but it Didnt work for me So i am going ahead and sharing my guide which i think is so simple and work like smooth like butter.
1- HDD i have it formatted to HFS+ but it work for me with NTFS
2- when u attach the HDD to the extreme and share - Airport Extreme creates a New folder called "SHARED"
2a- and if u create a user it will create another folder with that username. so i kept it simple. Guest access enabled on the sharing of my HDD in airport extreme DISK settings.
3- i put everything from Movies, TV shoes, Documentary, Pictures inside the shared folder
4- IN XBMC go to video , Select Add Video or Video Source, Select browse, then scroll down to Zero configuration browser
5- select the device or Airport extreme Name, in Either AFP or SAMBA ( i selected AFP )
6 - Hit OK
7- Select CONTENT of folder
8- Let XBMC scan folder
9- Repeat for TV shows or Music, etc.
10 - ENJOY !!!!!!!!!!!!!!!!!!!!!!!!!!
i hope this worked for every one
let me know if u have any issues and i would be more than glade to help out.
p.s. i am using - Airport extreme 5th gen
Apple tv 2 - 5.0 IOS
- airport Utility used it Under windows for more Options
- Seagate Ultra portable 1.5TB on airport extreme HFS+ format
- WD Desktop harddrive 2.5TB on airport extreme NTFS format