S.C. Code § 27-11-40
All such patents, grants, indentures and deeds and all other patents, grants, indentures and deeds from the proprietors, their governors, deputies, commissioners or trustees, when any lands have been so meted or ascertained, or returned as aforesaid, and the assignments thereof, are hereby ratified and confirmed, for and notwithstanding all or any such defects in the patents, grants or deeds aforesaid, or any of them, or the assignments thereof, or other defects whatsoever, in not timely executing, undue or nonexecution thereof as aforesaid, saving to every person and persons whatsoever, bodies politic and corporate, their executors, administrators and assigns, other than to the State and other than to the lords proprietors and their heirs and other than to such persons who do or may stand seized or possessed in trust for the State or for the lords proprietors, all such right, title, interest and demand whatsoever which they or any of them now have and may claim of, in or to such lands, tenements and hereditaments whatsoever or any part thereof.
S.C. Code § 27-11-40