If your device is not recognizing your microSD card, you may want to try the following steps:

1. Check that the card is properly seated in its SD card slot.
2. Make sure the card's format and file system are compatible with your device.
3. If using an adapter, make sure the microSD card is fully inserted into the adapter.
4. Clean the card and the card reader slots with a gentle cloth.
5. Reboot your device to initiate recognition of the card.
6. If the issue persists, you may need to upgrade your device's driver.