I have parallels 15. I have two guest machines. I am copying a large number of files from host to guest. It seems that during that process, I cannot use the other VM or even do anything else on the VM that is receiving the files. Why? Is this normal? Is there a setting that I have not set correctly? I would assume that the VMs would function just like a real device. That you can continue to work while a process such as copy and paste or drag and drop are running.