A storage system with a first storage zone with storage locations for storing unit loads, a second storage zone with storage locations for storing unit loads, guide tracks in the first storage zone, wherein one guide track extends in front of each of a plurality of storage locations located next to one another, guide tracks in the second storage zone, wherein one guide track extends in front of each of a plurality of storage locations located next to one another, one or multiple automated storage and retrieval units (8; 8'), wherein the storage and retrieval unit (8; 8') is displaceable in front of the storage locations (2, 5) along the guide tracks (6, 7) and is equipped with at least one load handling device (17; 50) for storing unit loads in the storage locations (2, 5) and retrieving unit loads from the storage locations (2, 5), and a transport device (12; 46), which connects the first storage zone and second storage zone and which comprises a receiving platform (28; 54) that can move to some or each of the guide tracks in the first storage zone and to each of the guide tracks in the second storage zone in order to transport at least one storage and retrieval unit (8; 8') between the first storage zone and second storage zone, characterized in that the first storage zone comprises a high performance storage and the second storage zone comprises a replenishment storage, and the high performance storage has an automated storage and retrieval unit (8; 8') or multiple automated storage and retrieval units (8; 8') and adjoins a handover device (11; 11'; 45; 45') for transporting unit loads between the storage and retrieval unit (8; 8') and a first conveying system (9, 10) for transporting unit loads to the high performance storage and transporting unit loads away from the high performance storage, wherein, exclusively in the high performance storage, the handover device (11; 11'; 45; 45') has respectively one provisioning device (20, 21; 40; 51, 52) assigned to the guide tracks for buffering at least one unit load and a transfer device (25; 53) interconnecting the provisioning devices (20, 21; 40; 51, 52) in the high performance storage and the first conveying system (9, 10) for transporting unit loads between the provisioning devices (20, 21; 40; 51, 52) and the first conveying system (9, 10), wherein the provisioning devices (20, 21; 40; 51, 52) can be moved to via the guide tracks by the storage and retrieval unit (8; 8') or by the storage and retrieval units (8; 8') for retrieving and/or storing unit loads, and wherein the number of the provisioning devices (20, 21; 40; 51, 52) for buffering at least one unit load each in the high performance storage is higher than the number of the provisioning devices (20', 21'; 40'; 51', 52') for buffering at least one unit load each in the replenishment storage. a first storage zone with storage locations for storing unit loads, a second storage zone with storage locations for storing unit loads, guide tracks in the first storage zone, wherein one guide track extends in front of each of a plurality of storage locations located next to one another, guide tracks in the second storage zone, wherein one guide track extends in front of each of a plurality of storage locations located next to one another, one or multiple automated storage and retrieval units (8; 8'), wherein the storage and retrieval unit (8; 8') is displaceable in front of the storage locations (2, 5) along the guide tracks (6, 7) and is equipped with at least one load handling device (17; 50) for storing unit loads in the storage locations (2, 5) and retrieving unit loads from the storage locations (2, 5), and a transport device (12; 46), which connects the first storage zone and second storage zone and which comprises a receiving platform (28; 54) that can move to some or each of the guide tracks in the first storage zone and to each of the guide tracks in the second storage zone in order to transport at least one storage and retrieval unit (8; 8') between the first storage zone and second storage zone, characterized in that the first storage zone comprises a high performance storage and the second storage zone comprises a replenishment storage, and the high performance storage has an automated storage and retrieval unit (8; 8') or multiple automated storage and retrieval units (8; 8') and adjoins a handover device (11; 11'; 45; 45') for transporting unit loads between the storage and retrieval unit (8; 8') and a first conveying system (9, 10) for transporting unit loads to the high performance storage and transporting unit loads away from the high performance storage, wherein, exclusively in the high performance storage, the handover device (11; 11'; 45; 45') has respectively one provisioning device (20, 21; 40; 51, 52) assigned to the guide tracks for buffering at least one unit load and a transfer device (25; 53) interconnecting the provisioning devices (20, 21; 40; 51, 52) in the high performance storage and the first conveying system (9, 10) for transporting unit loads between the provisioning devices (20, 21; 40; 51, 52) and the first conveying system (9, 10), wherein the provisioning devices (20, 21; 40; 51, 52) can be moved to via the guide tracks by the storage and retrieval unit (8; 8') or by the storage and retrieval units (8; 8') for retrieving and/or storing unit loads, and wherein the number of the provisioning devices (20, 21; 40; 51, 52) for buffering at least one unit load each in the high performance storage is higher than the number of the provisioning devices (20', 21'; 40'; 51', 52') for buffering at least one unit load each in the replenishment storage.