Im trying to export a movie I ripped to my external HDD. I never have had a problem with this, however the one particular file I am trying will not go, it is saying it is unauthorized. I was able to transfer from my iMac to my Macbook with no problems, I was able to transfer from my Macbook to my work computer which has XP Pro. I even tried going from Windows to my external and it doesnt work. When I try to go from windows it says disk full, but I have 150gb free on the external. Any Ideas? The file plays fine, so I dont think it is the file that is corrupted, it is also in .mkv format, but I have transfered other .mkv files no problem.