Works perfectly.

Was using Synk Pro for years but their last update was in 2012 and the program no longers works with Sierra. So after spending about 2 hours digging around I found this simple little app that does the same thing as Synk Pro (less the archive backups). I’ve just completed about an hour of testing and it seems to work beautifully. I’ll be using it for Pro Tools backups to an external drive with auto 5 minute increments.

FisherMusicInc about SyncTime, v2.5