I have been using Drop Box for some years now and have found it to be a simple to use and relatively pain free system. The problem is DropBox Teams account has a minimum of 3 licenses when I only really need two. So I am paying a lot more than I need pay.I also find the system slow when I am uploading huge amounts of data.I think a lot of the reviews I have been reading are harsh. Certainly better than using some dodgy Chinese app.