FreeFileSync: Backup and synchronization of files and folders.
FreeFileSync is a program for Windows, MacOS, and Linux in charge to synchronize the contents of folders and files.
It 'very simple, offers three types of synchronization:
Mirror only create a backup of the contents of the first folder within the second: the entire contents of the destination directory is overwritten with that of the source folder.
Updates This mode copied to the destination directory only those files that are new or that have changed in some way.
From the 2-sided This mode allows you to simultaneously adjust the content featured in two folders: New or updated files found in the first folder will be copied to the second directory and vice versa.
I recommend everyone to try it, because it is very simple to use, for example, I use it to back up photos to an external hard drive.
Home: https://freefilesync.org/