What's the Difference Between One-Way and Two-Way Synchronization?

 

Within one-way synchronization, data files, or folders are copied just only from your source location to your target location, the files copied just in one direction, no files are ever copied back from your target to the source location. There are three sync methods are all one-way sync with in SyncBack4all
1. Sync (Update target folder only)
2. Sync (Update target folder and delete obsolete files)
3. Mirror (Make target exact same as source folder)

In two-way synchronization, SyncBack4all replicates data files or folders in both directions, keeping the source and target locations in sync with each other. There are two sync methods are all two way sync in SyncBack4all.
4. Bi-directional sync
5. Merge