Hey mates. I got a pop up message regarding a 18.04 LTS to 20.04 LTS upgrade today when I logged in. If I take the upgrade does it wipe the pc and install the OS fresh or is it an actual upgrade and will everything I customized and installed be left alone? Also how much free space do I need to clear for this upgrade? I always assumed I had to download a newer distro separately if I wanted to upgrade the distro itself and it was a clean install. I don't want to have to redo everything all over again so I am wondering if I am better off staying at 18.04 LTS or if it is safe to upgrade it or not basically. Thanks in advance.