According to one embodiment, a storage system includes a circuit board, a connector, a first memory system, and a second memory system. The connector is on the circuit board and includes first and second slots, the first slot having a first terminal group of first terminals aligned in a first direction, and the second slot being separated from the first slot in a second direction not parallel with the first direction and having a second terminal group of second terminals aligned in the first direction. The first terminal group is reverse to the second terminal group in terminal arrangement order in the first direction. The first memory system is connectable to the first terminal group, while the first memory system is inserted into the first slot. The second memory system is connectable to the second terminal group, while the second memory system is inserted into the second slot.