Pawgy, if I remember correctly, OFF and WOFF will only look at the drives in your computer when it installs. Anything that is connected via a USB port will not be found. The only way I know of to have an install on an external drive is to first install it to one of your internal drives, update the install, then copy and paste the entire "OBDSoftware" folder to your external drive. I've done this and it works fine, however you will not be able to install any future updates to it because, again, the update will only look at the drives in your computer for your OFF/WOFF install.
Three RFC Brass Hats were strolling down a street in London. Two walked into a bar, the third one ducked.
Former Cold War Warrior, USAF Security Service 1974-1978, E-4, Morse Systems Intercept, England, Europe, and points above."pippy-pahpah-pippy pah-pip-pah"