Here is what I have:
An "old" PC desktop which I reimaged with Windows 8.1. I have it setup so that it auto logs in as a local user and launches the Horizon View via command line (mentioned in previous post). Prior to upgrading to Horizon View, we were able to insert a USB drive into the Desktop and access it from the virtual desktop. The USB drive (fat32, 2GB) blinks as if it is being read but never appears in windows explorer. I waited for over 1 minute. We never experienced latency prior to the upgrade. The previous version of view had, in the menu bar, a check box to allow connection to USB ports. Horizon View does not have this menu item, therefore I believed I needed to add the USB option in the command. I'm sure it is something silly I am not doing, but what is it?