For hardware enthusiasts, the SM3271AC1 PCB (Printed Circuit Board) is a playground. Many cheap USB drive PCBs have two NAND footprints (U1 and U2) but only one is soldered.
If you have a soldering iron, steady hands, and a donor NAND chip (same model as the original): smi sm3271ac1
The result? You double the capacity and (almost) double the write speed. This is a classic data hoarder mod for creating cheap, high-capacity USB 2.0 drives from e-waste. For hardware enthusiasts, the SM3271AC1 PCB (Printed Circuit
ChipGenius (Windows) is the industry standard. It will read the USB descriptor block and output:
Controller: SMI SM3271AC1
Flash ID: 0x45,0xDE,0x94,0x93,0x76 (which you can decode to find the NAND manufacturer – Intel, Micron, Toshiba, Hynix). The result
Let’s set expectations. Do not confuse this with a modern USB 3.2 drive. The SMI SM3271AC1 is a USB 2.0 controller. In real-world testing using tools like ChipGenius and H2testw, here is what you can expect: