O&O AutoBackup is described as 'Automatically synchronizes selected files and folders with an external backup device (USB Stick, external USB hard disk, FireWire volume). As an example, you can use O&O Auto backup to create a backup copy of your photo folder onto a USB stick and set it' and is an app in the backup & sync category. There are more than 25 alternatives to O&O AutoBackup for a variety of platforms, including Windows, Mac, Linux, Web-based and Android apps. The best O&O AutoBackup alternative is Duplicati, which is both free and Open Source. Other great apps like O&O AutoBackup are rsync, IDrive, Areca Backup and EaseUS Todo PCTrans.