SyncBuddy is the easiest backup sync available for your Mac. Designed by the makers of FolderWatch, this new app was built from the ground up to provide simple ONE-WAY sync. It's not meant to replace complex syncing apps like iCloud or Dropbox, but instead offers an extremely fast and reliable way to automatically back up your photos, music, or other important folders to another place on your computer or external/network drive.
Updated on Nov 29 2018
Note: Now requires OS X 10.11 or later