Automatic USB Backup Desktop comes in four editions: Standard, Professional, Realtime and Backup & Synchronize. Backup & Synchronize is the full edition with all features enabled, while Standard, Professional and Realtime are the limited-functionality editions.
Automatic USB Backup Portable is a mobile application of Automatic USB Backup, that can be directly run on portable USB devices. It comes in two editions: Real-time and Backup & Synchronize.
The program is compatible with Windows Vista, XP, 2000 and 2008/2003/2000 Server as well as Windows 7.
Click the Compare Products you can find a comparison of the features available in each edition.