cgsecurity.org

I have an external Sandisk Drive with a Lost Partition . Tried the root user authority process on Mac OS Catalina and Ventura , but TestDisk seems not to work on these OS. Shows no drives and responds 'You need to be root to use TestDisk' despite me giving roots access to it and Terminal. Any answers or do I go and find another Recovery Software/process . Disk Drill shows all the drives files BTW so there must be a way with TestDisk. Any advice?

Thanks!