Apps similar to Second Copy include GoodSync, which has a free version. Other options are SyncBack, DirSync Pro, DSynchronize and Qtd Sync. You can choose from more than 10 File Sync Tools like Second Copy for Windows, Linux, Mac, Android and iPhone.
Fast-Backup is an MIT-licensed backup application for Windows. It copies only files that have changed after the first backup, making regular backups to USB drives, external disks and network locations faster.
Organyze SYNC, a Windows application for desktops and laptops, takes care of the headache of keeping files updated in all locations in today’s fast moving world, where we use multiple computers and devices for work, social activity and fun.
