TROUTNC  developer's comments appear to indicate this app does not do full (2-way) synchronization which results in updated equivalent directories.

Seems to be a major short-coming in a synchronization application.  
(Version 2.1)

—DAN  This is a wonderful program. Small, concise, and complete. Remembers a list of files to backup. This does exactly what I need.  
(Version 2.0.8)

L0XBY  v2.0.1 appears to have fixed the issue with writing to sparse images. thanks for the quick bug fix!  
(Version 2.0.1)

L0XBY  I created a 128-bit AES encrypted sparse image on my iPod with Disk Utility and tried to sync some files to it, but it didn't work.  
(Version 2.0)

CHADWITHUHC  this is the best free syncing app ive used. ive been using it for a while and ive tried to find better, i have not been able to find another. its so simple and does the job. great work.  
(Version 1.4)

SYED ALI  According to the developer

>>>>That said, FileSync DOES synchronize files it finds in the "copy" with those it sees in the "master", it compares modification dates and copies the more recently modified, whether it's on the master or the copy.

Any new files on the "master" not on the "copy" are copied to the "copy"; however new files on the "copy" are not copied to the "master". Again, another "safety" decision, I felt it important to leave the "master" alone unless it is entered as a "copy".  
(Version 1.3)

R CHARLES FLICKINGER  If you save a file and synchronize within one miniute after previously saving and synchronizing, the file will not be considered modified. I had not seen this with regular usage, but I've confirmed it can happen when testing FileSync.

FileSync looks at fle modification dates and converts them to seconds. I believe these are rounded to the nearest minute as the Finder displays them. Hence, if you save and synchronize again within one minute, the modification date looks the same.  
(Version 1.2)

NESTIENN  I want to synchronize two folders standing onto 2 differents Mac (iMac G4 / MacBook intel).

After some update of Word document, FileSync running on the iMac did not detected modification and then do not synhronize them.

I'm a little disappointed because this simple tool seems to fill my expectation in terms of files/folders synchronization: simple but unfortunalty not so efficient.  
(Version 1.2)

ALBORETO  Very good for what it does! It's small, simple and very fast! No extras or knick-knacks, just pure synchronization!

Al  
(Version 1.1)

R CHARLES FLICKINGER  Yes, if you delete a file or folder on the "master", FileSync will not delete the same from the "copy". This was a "safety" decision. I did not want to write a software that deleted files from hard drives without asking permission.

That said, FileSync DOES synchronize files it finds in the "copy" with those it sees in the "master", it compares modification dates and copies the more recently modified, whether it's on the master or the copy.

Any new files on the "master" not on the "copy" are copied to the "copy"; however new files on the "copy" are not copied to the "master". Again, another "safety" decision, I felt it important to leave the "master" alone unless it is entered as a "copy".

When you are expecting orphaned files on a copy to be deleted, this is called mirroring. Until I program to remove orphaned files, FileSync will not do mirroring. You must manually remove from the "copy" any items that were renamed or deleted from the "master".  
(Version 1.1)