This service, since they changed their policy, sucks. They recently changed their policy on their free account of not more than 3 devices linked at one time and they said if you had more than that before they changed to that policy you could keep all the devices connected. That was a lie, I had 6 and I was forced to disconnect 3 from the service.
I complained with no results and no consideration from them about their own policy. The price they charge for the paid account is ludicrous when there is other services far better with more storage for free like Google Drive at 15 gig with unlimited devices linked which is what I transferred to when Dropbox refused to allow me to relink my 3 devices that they forced me to unlink.