Unfortunately it doesn't seem so, I have two kind of messages including filenames: SyncFileEntry: Failed to write attributes for file <path> - 38 ReadFile error: <path>.!sync:753664:32768:32768:3 for several files which are actually present in all clients, regardless the error message. These messages are limited to the first sync attempt, then the log doesn't contain any reference to any one among the trouble files. I checked the file sizes to understand whether there is a correlation between the error and the missing amount. The "ReadFile" amounts to 10KB, while the "SyncFileEntry" files to around 4GB. There's no relation with the reported missing 60MB. This amount is consistent among different OSX clients that sync without problems (they both reports that the rpi misses that amount). Bottom line, the sync.log doesn't help to pinpoint the troubled files and among 13GB of images is like looking for the proverbial needle in a haystack Any suggestion? BTW I'm looking at the standard log, not the debug one.