Installed two SATA drives in enclosure connected via firewire to iMac. Will only read. Want to share drives with Windows based so formatted NTFS. Have tried a downloaded utility that's supposed to make them RW but doesn't work. Running Mountain Lion BTW. In terminal now and typed sudo nano /etc/fstab to get to editor. Have written in editor UUID=C440781A-40A9-ACC4-60C4-ACD2ECACD2E4 none ntfs rw UUID=7866522B-6663-4678-8778-46DA8C46DA86 none ntfs rw I don't know how to write and save this then exit to restart machine. What do I do from here? Thanks.