Synchronization of directories and files

For those who want to make backups of type "directory synchronization, there is a free tool, lightweight and efficient Microsoft (unfortunately only in English) that can create" folders synchronized pairs "that SyncToy is in 32 and 64 bits.It is very easy to define a number of "pairs of directories" qeu can simply sync => what is changed on one side (on your PC) is postponed to another (on a