Case for memory or data storage

A storage device comprising:

• a printed circuit board (PCB) with attached semiconductor chips, each including a memory, and with at least one wire coupling the semiconductor chips;
• and
• a case comprising a first case surrounding a top portion of the printed circuit board and a second case surrounding a bottom portion of the printed circuit board,
• wherein a flat sidewall of the first case and a protrusion of the second case form a stepped bending structure, the protrusion surrounded by the flat sidewall,
• the flat sidewall of the first case is coupled to an inner portion which extends partially downward and along the flat sidewall and faces the protrusion of the second case,
• both the flat sidewall of the first case extending below a lower surface of the printed circuit board and the protrusion of the second case extending above an upper surface of the printed circuit board cover all of a side of the printed circuit board, and
• the inner portion extending partially downward and along the flat sidewall of the first case and the protrusion of the second case extending above the upper surface of the printed circuit board are separated by a slit present above the printed circuit board, and
• the inner portion, extending partially downward and along the flat sidewall of the first case, stops above the slit present above the printed circuit board such that the slit above the printed circuit board provides electromagnetic shielding.