Storage device and external hardware

A storage device comprising:

• a storage body;
• a first folding flap;
• and at least one first security mechanism, wherein the storage body includes a first plate and a second plate that are connected to each other, and the first plate and the second plate can be folded along a folding line to form a storage chamber, and when the first and second plates are folded along the folding line, the storage body has the storage chamber with a storage opening,
• wherein the first folding flap is connected with the first plate, and the first folding flap is used to turn around and overlap onto the surface of the second plate according to the first setting axis relative to the first plate to seal the storage opening, or the first folding flap is used for turning around the first setting axis relative to the first plate, so as to insert into the storage chamber through the storage opening,
• wherein the first security mechanism is used for connecting the first folding flap and the second plate when the first folding flap is overlapped onto the surface of the second plate, so that the storage opening is sealing;
• or by disconnecting the first folding flap and the second plate so that the storage opening can be opened, and
• wherein upon insertion of the first folding flap into the storage chamber, the second security mechanism can connect the second plate and the first folding flap to seal the storage opening;
• or the first folding flap folds over the second plate to seal the storage opening formed by the first plate and the second plate.