If you have a laptop (Dell, HP, Lenovo, etc.), go to their support site, enter your model number, and download the "Card Reader" or "Chipset" driver. 3. Common Troubleshooting Tips If the driver is updated but the card still won't show up:

If you know your hardware brand, these are the most common official sources: Realtek Card Reader Drivers Intel Chipset Software

If you are using a very old computer (pre-2008), the internal reader might only support standard SD cards (up to 2GB). In this case, no driver can fix it; you will need a cheap USB SDHC/SDXC Adapter . 4. Direct Download Links (Common Hardware)