Format the sd with the SD formatter
https://www.sdcard.org/downloads/formatter/
Then, if you want to use fat32 use guiformat
http://ridgecrop.co.uk/index.htm?guiformat.htm
https://github.com/WerWolv/ovl-sysmodules/releases
https://github.com/WerWolv/Hekate-Toolbox/releases/
Or you can simply delete the flag file in the module's folder that you want to disable.