I have a number of files with -rwxrwxrwx@ file permissions (note the @ at the end - this comes from an ls -l command in terminal). They are photos on an external drive. When I try to copy them to a new drive I am advised that I do not have permission to copy them (despite rwxrwxrwx). This is confusing and also very hard to search for (@ not liked at all). Can anyone tell me what the deal is? I have a suspicion it may relate to the photos being imported iPhoto at some time but that I cannot confirm. I can copy them to a windows machine and then to the final destination but all the last modified dates get changed (not a desirable outcome). Thanks in advance for the help.