A storage system 1 includes a first storage apparatus 100 and a second storage apparatus 100 communicatively coupled to an external apparatus 300. The first and second storage apparatuses respectively have first and second storage areas VDEVs selectively accessible from the external apparatus, first and second temporary storage areas 113, and remote copy controllers 1122 configured to control data copy process. The storage system includes a data I/O process authority information storage unit LDK storing data I/O process authority information. Either of the remote copy controllers reads the data I/O process authority information and copies according to the data I/O process authority information, to the other storage apparatus, data stored either in the first storage area and the first temporary storage area, or in the second storage area and the second temporary storage area that are included in the storage apparatus to which the remote copy controller belongs.