Looking for Charles Clark family

Hello, everyone. I am looking for more information on my 5th great grandfather, Charles Clark. All I know is that he was born in County Cork around 1730. His father was Henry Clark who was born around 1705. I have no information on his mother or siblings. Charles emigrated to the U.S. at some point (South Carolina) (unsure of year or how he got here) and married Elizabeth (Betty) Medlam. Any help or suggestions would be greatly appreciated!