Currently, the filesystem fixes are applied only for FAT, in which these
special characters (:, ", etc.) are actually forbidden. NTFS, however, will
allow you to create file names containing these characters, but Windows will
still be unable to deal with the files (even to rename them!).
--fs-fix=force will be useful when copying to a NTFS filesystem that will be
read on Windows.
--fs-fix=no is the same as --no-fs-fix.
--fs-fix=auto is the same as the current default behaviour (i.e. fix names only