NMT:Samba
Easy. Once Telnet access is enabled
Edit /etc/samba/lib/smb.conf and edit the Share section and simply remove the HARD_DRIVE from the path
[Share] path = /opt/sybhttpd/localhost.drives/
Start and Stop Samba to see the effect, however you may need a reboot.
You can now mount your USB devices as a network drive in Windows, or share it with your other media streaming devices around the house.
If your drive is formatted with a linux extended file system, you may need to adjust your permissions accordingly to allow write access.