S.C. Code § 7-5-410
Each county board of voter registration and elections shall deposit the official records of registration for safekeeping in the board's office or in the office of the clerk of court of common pleas for its county, who shall keep them with the other records in his office. The official registration records shall be public records open to the inspection of any citizen at all times and shall not be removed from the office by any person except the county board of voter registration and elections which may take and keep them as long as may be necessary to enable it to perform its duties. The official records of registration shall not be kept anywhere else except when their use is required elsewhere by the provisions of this Title.
S.C. Code § 7-5-410