South Carolina was a proprietary colony until the colonist got tired of the way the Lords Proprietors were "handling the business". They (the colonist ) petitioned the King to take control of South Carolina as a Royal colony. He did in 1719.
The Carolina Colony was originally a proprietary colony, however after disputes of power and ownership arose the crown split the colony into what is now known as North and South Carolina. http://en.wikipedia.org/wiki/Province_of_South_Carolina