well, im assuming that file error is coming from fcp and its saying that it cant find the media files and you have a choice of reconnect or continue. Click reconnect and a new window should open. Select locate/search (i forget which one is the better choice) and then find where you transfered your clips in your laptop.
This is happening because your save file from the desktop still thinks its still on the desktop. your clips are not really missing, but instead, your fcp doesnt know where the clips are on the laptop.
in addition to the clips you want to edit, final cut pro may also annoy you by saying more clips are missing, but its really the render files are missing.