A mass data storage system, which comprises: a controller for issuing and receiving signals to carry out memory operations; a motherboard comprising at least one first connector and providing signal pathways for establish a ring from the controller via each of the at least one first connector and back to the controller; and at least one non not volatile memory module comprising a second connector electrically connected to a chain of non-volatile memory devices, wherein mating of the second connector with a given one of the at least one first connector causes the chain of non- volatile memory devices to be inserted into the ring, thereby to allow the controller to carry out the memory operations on the non- volatile memory devices in the chain.