Why did more enslaved african live in south carolina than did white settlers?

here is my answer I sujisted

most slaves lived in south Carolina than did white settlers because the got lots of jobs to do and some people even sold their selves to slaves because the were willing to get money and when the get money they can be released ... some of the slaves worked hard so that their masters could free them and the will be able to go on with their lives

Because one slave master would own 20 slaves and if there is approx. 20 slaves per white settlers.