Micro Usbdev — Alcor

| Chip | USB VID:PID | Description | |------------|-------------|------------------------------------------| | AU6370 | 058f:6377 | USB 2.0 SD/MMC/MS single-slot reader | | AU6366 | 058f:6366 | Multi-LUN reader (up to 4 slots) | | AU6476 | 058f:6476 | USB 3.0 + SD 4.0 (UHS-II) |

lsusb -d 058f: -v | grep -E "idVendor|idProduct|bDeviceClass|bInterfaceClass" : Use USBDeview or Wireshark with USBPcap. Step 2 – Force class driver If the device is a card reader but appears generic: alcor micro usbdev

When plugged in, these enumerate as a with multiple interfaces — each memory slot appears as a separate logical unit (LUN). Without proper drivers, Windows sees the top-level device as “Alcor Micro USB Dev.” | Chip | USB VID:PID | Description |