Design background: SW sold out of stock during the outbreak, everyone's attention to it is very high. Design entry point: 1. Small memory capacity and large game memory (Switch actual memory: 32G, practical memory 25G)2. Too many cassette tapes require card package storage 3. Switching is troublesome and cannot be cut as needed. We are thinking about making a SW card expander, which allows users to store and switch the card tape at will.

Rotating the front knob can switch the cassette, because under the use state, the mechanical knob is more suitable for blind operation and the card cutting is more accurate.

There is a magnet inside the product, and a thin patch needs to be pasted on sw, which is a bit bug, but this is a relatively cost-saving way, ignoring my little fat hand.