If there is abnormal memory card usage of the Xiaomi Smart Camera C201, please refer to the steps to troubleshoot:
Please use a high-speed memory card formatted in FAT32, produced by the regular manufacturer for the camera.
Ensure that the required memory card is installed in the camera. Without a memory card, the camera cannot store or playback recorded videos.
If the memory card fails to record videos or does not automatically delete files, format the memory card using the camera's storage settings within the Xiaomi Home App.
If the memory card cannot be formatted in the Xiaomi Home App, it can be formatted on the computer through the card reader. After formatting, power off the camera and reinsert the memory card.
Note:
Formatting the memory card will delete all files stored on it.