FoldersSynchronizer is an nifty and popular utility for macOS which synchronizes and backs-up files, folders and disks. You can choose one or more pairs of files, folders or disks then FS will synchronize or backup those exactly.
FS lets you organize your sync and backup on several sessions you can save to a file for a later reuse. On each session you can apply special options like Timers, Multiple Folders, Filters, Exclude Items, Auto-Mount local and remote volumes, launch your own AppleScripts, set how to resolve conflicts, execute an incremental or an exact copy, include locked files.
FS lets you specify global settings like whether FS should display a preview panel listing all the files FS is going to copy, replace and delete. You can also choose to save a log file, to send a log file to a custom email address, to sync and automatically quit the application. FoldersSynchronizer has been successfully tested on macOS 10.15 Catalina.