One of our readers, Laurent, copied some data on his computer from his USB key before ejecting the key.
He inadvertently used the Command-Z which canceled his last copy. Of course, he used again the same combination (Command-Z) to redo the copy. Because the key was not connected to the machine anymore, he got this error message:
The thing wouldn't have been a disaster if he hadn't delete the files from the key on an other machine.
So, please remember that if you are copying data from a removable media and eject it, the Command-Z will erase the copied files from the machine and you will not be able to go backward.
