@Jon Clarke
Thank You for your reply, my download folder is also on my external drive, please see screenshot attached, Linux doesn't have a concept of a c: instead that would be / or "root". My external drive is pretty speedy as I run X-Plan off it with no issue. there is plenty of space on this external drive as I pointed out earlier "/dev/sda1 932G 422G 510G 46% /mnt/external" over 400gig. I can probably say it wasn't that way in the begining, but since i uninstalled, re-downloaded the Florida Scenery, then reinstalled is how I ended up with the validated Florida Scenery. The only item existing on my root /opt drive is "Orbx-central-4.1.1.AppImage" which where the Orbx executable exists.
Thank You!