PathSync is a System Utilities software developed by Cockos Incorporated. After our trial and test, the software is proved to be official, secure and free. Here is the official description for PathSync:
BrothersoftEditor: PathSync can analyze two directories and show the user a list of differences between the directories.
The user can select what actions should occur (which files to overwrite, which to delete, which to ignore), and allow PathSync to synchronize.
PathSync provides nifty statistics during the synchronization, so that the user is never wondering how much time is left, etc.
PathSync is GPL free software, each download package includes the source. + fixed a bug in filename masking for subdirectories + made file date comparer consider FAT32 no-modification-date to be equal to NTFS no-modification-date + made status bar only show directory names during scan (instead of files), much faster! + reworked GUI for sanity and symmetry + made icon vertically Symmetric + reordered item context menu to put "Local->Remote" option first + Alan Davies 0.33c updates: + Added folder sync. + Descriptive text for actions (Create/Delete). + Untabified whole file, cleaned up tab order of resources. + Fixed bug: 'Analyze' button stayed as 'stop' when path text invalid. + Fixed bug: Logging edit + button correctly disabled after Analyze. + Added 'Diff' and 'Open' options to context menu. + Synchronization window is Now resizeable you can free download PathSync 0.35 now.