When using the FileBrowser from the standard flash image to start SidWizard (which is a patched version of SidWizard to use the trampoline functions for the Cartridge Disk instead of the KERNAL load functions, because of the HIRAM problem), no directory is listed on a C128, but works on a C64. It should work without patches, because FileBrowser has not the HIRAM problem.
When using the FileBrowser from the standard flash image to start SidWizard (which is a patched version of SidWizard to use the trampoline functions for the Cartridge Disk instead of the KERNAL load functions, because of the HIRAM problem), no directory is listed on a C128, but works on a C64. It should work without patches, because FileBrowser has not the HIRAM problem.