Hello Oleg,
I use ftp synchronisation to upload folder / subfolders.
Situation; On ftp the are a few thousend folders in a subfolder, When i synchronise (+/- 4 mb in 4 folders) it lookes like it's stalled. After 15 minutes still "FTP Synchronaisation"
Remark; a made one empty folder on the ftp synchronised the same local folders (+/- 4Mb in the same 4 folders as above, and it was finished in 30 seconds)
Any solution for that?
FTP synchronisation
FTP synchronisation
Robotask rules! 

Re: FTP synchronisation
FTP synchronization may take much time even on local FTP server (server on your local network) if you have very many files/folders in remote folder.
Oleg Yershov