I have been researching this for ages now and tried many differnt options (https://discussions.apple.com/th ... art=45&tstart=0) but only happens on my Mavic SD card which I reformatted in the past but which has also had no effect.
One .mov video file will not copy across because I get the error "File in use" on the latest version of Mac OSX but it seems to occur on all versions. I have tried closing services like "DiscUnmountWatcher" and relaunching Finder.