Photo Transfer Crash

I was downloading files from my windows PC, I think I selected too many photos and the App crashed on the PC whilst connected to my iPad. I restarted the app and carried on as all looked well, but nothing has copied over and a day later the albums still do not appear on the iPad. Worse than that when I access photos whilst I can see previous downloads the busy icon is constantly appearing in the top left of the screen. Can I kill the process somehow on my iPad