The compatibility of the SanDisk Extreme microSDXC card with a Reolink Argus PT camera depends on the camera's support for microSDXC cards. Reolink cameras usually support microSD cards, but it is important to check the specific requirements of the Argus PT series. The write speed of the card is up to 90 MB/s, which should be sufficient for most surveillance tasks as long as the camera supports this speed.