Why can’t my 256G micro SD card work with the camera normally while 256G micro SD card support is in EZVIZ website display?

Please note that only partial devices have 256G micro SD card support function including C1C, C2C, C6CN, C3W, C3WN, C6T. Meanwhile the firmware needs to be updated to V5.2.7 or higher. Or else only 128G micro SD card or smaller can be supported.