Marcos Daniel has released a new version of Final Copy, one of the best MSX disk copiers ever. Supporting only Brazilian disk interfaces (port-based), this program can create backups of virtually any type of disk (including 360k and 720k 5 1/4" disks), including a lot of sector-based copyprotections and restoring CRC errors. As sources are included you are free to add support for other MSX diskinterfaces.
Relevant link: Final Copy