Minimalistic case for Small SSD Board, in this case SanDisk SSD Plus 240GB SDSSDA-240G. This board has dimentions 54mmx40mm. Overall dimentions - 57,5mm x 42,5mm x 7,2mm. The top is a light fit, I have secured it with a dab of super glue on each corner.
The Fusion360 files are also here.