I am running Windows 10 having upgraded from Windows 7 on a Dell desktop. I have run into what I am calling the "semaphore" problem. I am trying to copy/paste a folder that contains large video files. The source is on a drive inside a Synology DS413j server on my house network. The target is an external USB drive that is connected to my PC. The copy/paste starts but soon locks up and gives the "semaphore" message. I can copy/paste when the target is a different drive connected to the Synology box via a USB port on the Synology box. A Google search on semaphore and a lot of reading leads me to the following: 1. This problem has been around for a long time. 2. Lots of work a rounds but no REAL solution. 3. The problem exists whether one involves a network or not. Two questions arise: 1. Is there a way to get this problem to Microsoft and more importantly obtain a response concerning what they will do about it? 2. Is there a real fix to this problem?