The Alcor AU6370 is a USB 2.0 to SD/MMC/MS Flash Card Reader controller chip manufactured by Alcor Micro. You will typically find this chip inside internal laptop card readers, external USB multi-card readers, or all-in-one peripheral hubs.
If your computer is not recognizing an SD card, MicroSD card, or Memory Stick, you likely need to install or update the driver for this specific controller. Alcor Au6370 Driver Windows
If you plug the drive in and Windows says "USB Device Not Recognized," the issue is usually hardware, not software. The Alcor AU6370 is a USB 2
Follow this sequence exactly. Do not skip the reboot. external USB multi-card readers