syncroland

Hi Since I changed from 1.3.109 to 1.4.83 (now 1.4.91) my NAS WD My Book Live Duo (running the powerpc version), the sync is very slow...., tells me, that syncing will take 68 years ! :-) All my other clients running with Windows 8.1 are as quick as I know it. Does anybody know a fix?