Ok. To format a drive is to wipe it clean, and prepare it for use by an operating system. The instructions I posted were to help you create a Mojave system installer. This is the basic operating system for your Mac. At this point, as long as you have a backup, you could just install Catalina through the App Store and see if that resolves your problem. It may, it may not. If not, you’ll probably have to reinstall your operating system (Mojave or Catalina) after formatting your drive. You could try Onyx or another piece of software like that, but that may or may not work. I suspect the problem is your icons cache.
