Abstract: A card-type solid state drive (SSD) including: a substrate having an insertion edge, a first edge, and a second edge, wherein the first edge and the second edge are adjacent to the insertion edge; a protrusion on the first edge; first column terminals adjacent to the insertion edge and including a first power terminal and first data terminals; second column terminals farther apart from the insertion edge than the first column terminals and including a second power terminal and second data terminals; and third column terminals farther apart from the insertion edge than the second column terminals and including a third power terminal and command terminals, wherein the first, second and third power terminals are arranged along the first edge.