Every time we try to sync/upload several small files 1kb-10mb to our server the WinSCP transfer dialog box freezes and locks up for quite some time. After, a while it will unfreeze and start moving again, but it isn't long before it locks up and freezes again. If you wait it out all the files will transfer successfully, but I don't think it should lock up and freeze like that. If we are transferring large files like 4-8GB it will transfer find without freezing. Any ideas or how to resolve this issue? Thanks!