"The TP-Link camera supports a microSD card with a capacity of up to 512 GB. If the remaining space on an SD card is less than 500 MB or 5% of the total capacity before the camera is inserted for the first time, it will not be possible to record. There are different speed specifications for microSD cards and it is recommended to use a card with a Class 10 speed rating or UHS 1, which requires a minimum write speed of 10MB/s."