if you ever have had this error "Copying files to remote side failed. Invalid argument" while trying to ftp over to your xbox, the most likely cause of this error is the file name been to long, unless its a xbox file it seem that files can only be a maximum of 38 characters long (letters,numbers,spaces,symbols). if any of these 4 symbols are in the file name this will also result in the same error ;,=+ so basically keep your roms/files under 38 characters (INCLUDING SPACES) and don't use any of the above symbols, all other keyboard symbols were tested and worked fine. i will post a video demonstration of this when i get round to it if needed. hope this helps