S.C. Code Ann. § 30-9-75: Second or backup copy of indices maintained by electronic or computer means.

In all cases where indices affecting real property are required to be maintained in the offices of the clerk of court or register of deeds and where these indices are maintained by electronic or computer means, the clerk of court or register of deeds shall provide at least a second or backup copy of the indices which must be available for use by the public in the event of destruction or unavailability of the electronic indices.