Ive been having troubles wth my usb rubber ducky ive tried lots of things holding down the reset button before plugging in, trying to upgrade drivers, replacing the sdcard but i still get the dreaded red led wen its pluggedin. I have a solution I got a Kali Linux Nethunter device going little did i know about a little thing on it called duckhunter hid this solved all my problems nomore fiddling with tiny sd cards or unplugging plugging in, downloading files to one thing transfering to another. This app does it all its great. Ps with the recent upgrade to the app it also includes a connecter to use a wifi pineapple ( i find that it crashes far too often though)