I’m using Boxifier to sync an external drive and it works pretty well, except for one little anoying detail. I don’t know why it is stuck, and always with the blue arrows sign of syncing, forever. It always says it is trying to sync two files, but when I enter the external HD via My Computer it shows all the folders with the green check sign. My guess is he is trying to sync a hidden file inside the external HD, and maybe not being able to for some reason.
Best