Since installing Lion OSX I cannot transfer moviefiles (mkv and avi) to my external harddisks. I have two different harddisk, which are working (as an example I have tried transferring af jpg file, without problems). I have run Disk Utility, which said "All ok". Both disk worked well receiving the movie files before I upgraded to to Lion, it worked without problem. Also, I can transfer files (mkv and avi) from the external hardrives to my macbook pro (with Lion) without problem. What happens when I try? When I try to move several mkv/avis-files which are in folders, as a batch, only the folders are moved - not the content. When I try to move the mkv/avi files seperately, the system moves them (and the progress "bar" is shown - when the transfer is done, the file is "removed" from where I just moved it to... What am I doing wrong?