Lost all access to my files

Hello! Recently, I decided to uninstall and reinstall clip studio paint pro, due to wanting to switch what drive it’s located on my pc. However, as soon as I finished the process, I lost all access to my artwork and any folders with my artwork in it. I quite literally haven’t done anything else to my pc, and was able to access the files just fine right before uninstalling. Does anyone know why this happened? And how to fix it? Thanks!