Safestore is the UK's largest self-storage group with 181 stores.safestore was founded in the UK in 1998. It acquired the French business “Une Pièce en Plus” in 2004 which was founded in 1998 by the current Safestore Group CEO Frederic Vecchioli.In March, Safestore acquired the remaining 80% of the equity owned by Carlyle Europe Realty in the Joint Venture.