I made a lubuntu live stick with lubuntu 19.04 and added apps, folders, and files. It now uses about 22 GB on a 64 GB USB stick. I can create an image from it which uses 64 GB as well of course. So it fits perfectly on other 64 GB sticks but also uses 64 GB on a 128 GB stick as well and the remaining 64 GB can’t be used while I can’t duplicate it on a 32 GB stick at all. Is there a way to create an ISO so I can install my image on 32 GB or 128 GB sticks as well? I couldn’t find anything yet and would be really thankful for help!