FreeFileSync

Open Source File Synchronization

• During comparison FreeFileSync groups all folders by their root devices
• For example, consider a configuration with two folder pairs and parallel file operations set up:
  C:\Source ↔ D:\Target
  C:\Source2 ↔ E:\Target Device root Parallel operations
  C:\ 1
  D:\ 2
  E:\ 3
  FreeFileSync will put the folders C:\Source and C:\Source2 into the same group and allow only 1 file operation at a time
• Folder D:\Target will be traversed using 2 operations, and E:\Target using 3 operations at a time
• In total FreeFileSync will be scanning all four folders employing 6 file operations in parallel
• When synchronizing a folder pair FreeFileSync will use the maximum of the number of parallel operations that the two folders support
• In the previous example the folder pair C:\Source ↔ D:\Target will be synchronized using 2 parallel operations, and C:\Source2 ↔ E:\target will be using 3