Please go to the [Mi Home] app >> tap your surveillance device card >> tap the [...] icon at the upper right corner >> [Manage storage] >> [SD card status] >> [Format SD card].
Note:
1. Formatting the SD card will clear all the videos in the SD card. Please be sure to save the videos first;
2. SD card recording mode: After entering the SD card management interface, click Recording Mode to view the SD card recording mode. The recording modes are divided into always record/only record moving pictures.