I've been researching this all night. I am trying to copy all of my media to my external drive and every couple of files I get an error like the one below. After a bunch of googleing I found a temp "resolution" using terminal that involved a "dot_clean" command but Apple addressed this issue in April 2010 so you should not have to do this any longer. Still, I tried anyway and it did not work for me. Also, my drive is formatted as Mac-OS extended. I really need this to work and cannot figure out a solution. Thanks! PS: It is not any specific type file. It will copy 10 or so MP3's and then bring the error up for the same file type. It is also doing this for my (iTunes created) album artwork folder and my videos.