There's a gnarly bug with hanging or breaking transfers in Safari 10.0(.1) for our Mac users. We are actively investigating this issue with our engineers and have implemented several fixes for this so far. If your transfer stalls at the very end, please clear your cookies and cache, and give it another go. We've seen in other cases this fixes the issue entirely. Once we know more, we'll improve the situation for you as soon as humanly possible.
Are you using a different browser or operating system and are you encountering the same issues? Then we might have a couple of other suggestions for you to help with your connection!
Transfer still stuck after checking out these suggestions? Send us a ticket so we can help.