Issue Description
The app prompts a microSD card error after the microSD card is inserted to the product.
Possible Cause of Issue
1. The microSD card is not compatible with the product.
2. The microSD card is damaged.
Solutions
1. Use a microSD card that is compatible with the product. For the recommended microSD card, please refer to Product Specifications in the DJI's official website.
It is recommended to use a microSD card that meets the standard UHS-I Speed Class 3 or above.
2. Please try to install the microSD card to other device and see if the microSD card can be read normally. If not, use another microSD card. If yes, please take out the microSD card, back up the required information, format the microSD card, reset the camera parameters of the product, and then insert it into the product again.
Osmo Nano
Back up the footage from the SD card using a card reader, and then format the SD card in the camera. To format the SD card, go to [System Settings >Storage ].
Osmo 360
Back up the footage from the SD card using a card reader, and then format the SD card in the camera. To format the SD card, go to [System Settings > Format].
Osmo Pocket Series
Formatting the MicroSD Card via DJI Mimo for Osmo Pocket Series

Osmo Action Series
Formatting the MicroSD Card via DJI Mimo for Osmo Action Series

If the issue cannot be fixed through the above solutions, please contact DJI Support for further assistance.