I am trying to share a folder in Lubuntu over a network that's on an external NTFS drive. Due to the system that I have (rotating backup disks) this is probably the second time that the drive would of been mounted. Its manually mounted with a simple (for example)

 mount /dev/sdb1 /media/BACKUP

On an internal NTFS disk I have successfully setup a network share and can access it. However on the external disk I can't from any other Windows computer. When setting up the share Nautilus said that it needs to change the other's permissions to allow for other users to write. However afterwords its still blank. Changing it to Read and Write just changes back to blank. Chowning the entire /media folder recursively and trying didn't work. Running PCManFM as root and changing didn't work. Adding "public=yes" to smb.conf and restarting didn't work. I'm out of idea's on what to do.

What's weird is that it worked just fine on an internal NTFS disk, so why not the external one?

Any solutions need to be able to managed inside of a gui (preferably Nautilus) as the person managing the machine isn't as tech savvy.

Thanks