https://volvocarstadiumconcerts.com/faq/
Concert Parking
-General Parking is located at Benefit Focus, 100 Benefitfocus Way, Charleston, SC 29492
-There is no fee to park in General Parking
-Shuttle buses will loop from general parking staring 1 hour before gates open until 1 hour after the show ends.
-Premium parking and handicap parking is located near the Volvo Car Stadium on Seven Farms Dr.
-Premium Parking consists of a fee and is limited. The lots are located near the Volvo Car Stadium.
-Premium Parking cannot be purchased in advanced and is cash only.
-Handicap Parking is located at the Volvo Car Stadium.
-Parking lots open at 5:00PM and close 1 hour after the show ends.
-Tailgating is prohibited by the City of Charleston.
I think I saw somewhere that premium was $10 but I could be misremembering that.