[Hampshire] External Drive Permissions.

Hi Folks.

I have a western digital hard drive attached to a usb port on my deb
box. It mounts automagically on boot and I can access the file structure
and read/write files from a windows samba client. However, when working
on the Deb box I found the non-root users only had read permissions. So
I changed the ownership of the device (which is mounted as
/media/mybook) to my non-root user. Still cannot write to the external
drive.

Interestingly the mount point shows linked to /dev/sda1 when the
properties of the device are checked. However, when I look in /dev the
fdd1 is mapped to sda1??

What have I got wrong on the Deb box please?

TIA
Mike