GoKawiilResearcher completes first file transfer using homemade magnetic core memory USB drive
Japanese researcher @dydt_Nao successfully demonstrated a dinner-plate-sized USB flash drive built from magnetic core memory, transferring both a text file and a small monochrome bitmap image between two PCs. The device, which uses a Raspberry Pi Pico as its controller, stores only 128 bytes of data and displays activity through a 32x32 LED array that lights up as each magnetic core is accessed. The creator plans to showcase the device at Maker Faire Tokyo 2026 in early September.