FreeFileSync

In this day and age of ransomware holding your data hostage (those jagoffs will not be getting past the pearly gates), it pays to have current backups of files you keep on your local machines. FreeFileSync, as its name clearly states, is a free (I love free) utility that will synchronize your files and folders between two locations and works on Windows, Mac and Linux. I suggest buying an external drive that you only plug in for backups, run this utility, disconnect the drive and store it on a dark shelf until next time.

https://www.freefilesync.org